And furthermore [in Yuchsin in the letter of Rashbag]: The Exilarch - how is he appointed and how is he selected? All the officials agree with him at the time of his appointment, this is the matter. If the community agrees to appoint him, the two heads of academies gather with the members of their academies together with all the community leaders and elders in the house of a great man of Babylonia, from the leaders of the generation.
And this one in whose house they gather gains honor in the matter and has great praise in it, and his honor increases through the gathering of the great ones and elders in his house. And they gather thus on Thursday, and they bless him and lay hands upon him, and they blow the shofar to announce to all the people from small to great. And when they hear the matter, each and every one sends him a gift according to his means, and all the community leaders and their wealthy ones send him beautiful garments and jewelry and vessels of silver and gold, each person according to his means.
And he prepares a feast on Thursday and Friday with all kinds of food and drink and garments and sweets. And when they go to the synagogue on the Sabbath, many of the community leaders gather with him to go to the synagogue. And they have already prepared for him in the synagogue from the eve of the Sabbath a wooden tower seven cubits long and four cubits wide, and they spread upon it beautiful garments of silk and blue and purple and scarlet wool until it is entirely covered and nothing of it is seen.
And underneath it sit young men chosen from the Nasiim of the community and their leaders, young and virtuous men with pleasant and sweet voices, expert in all matters, and the Exilarch himself is covered in a place with the heads of the academies, and the young men stand beneath the tower and no one sits upon it. And the cantor begins with "Blessed is He Who said," and the young men respond to every matter from "Blessed is He Who said" with "Blessed be He." And when he says "A Psalm, a Song for the Sabbath day," they respond after him "It is good to give thanks to the Lord," and all the people together read the verses of praise until they finish them.
And the cantor stands and opens with "Nishmat Kol Chai" and the young men respond after him "Your Name shall be blessed." He says a word and the young men respond after him until they reach the Kedushah, and they say it - the congregation in a low voice and the young men in a loud voice. Then the young men are silent, and the cantor alone completes until "Go'el Yisrael." And all the people stand in prayer, and when he passes before the ark and reaches the Kedushah, the young men respond after him "HaKel HaKadosh" in a loud voice and they complete the prayer.
And all the congregation sits and the Exilarch comes out from the place where he was covered, and all the people stand on their feet until he sits on the tower they made for him. And the head of Sura comes out after him and sits on the tower after giving him a bow, bending forward, and he returns it. And then the head of Pumbedita comes out and he also gives him a bow and sits to his left. And all the while, all the people stand on their feet until the three of them finish taking their seats, and the Exilarch sits in the middle, and the head of Sura sits to his right, and the head of Pumbedita sits to his left, and between them and the Exilarch is an empty space, and over his place they spread a beautiful canopy over his head above the tower held by ropes of linen and purple.
And the cantor puts his head in his cloak in front of the tower and blesses him with blessings prepared from the day before in a low voice so that only those sitting around the tower and the young men underneath can hear him. And when he blesses him, the young men respond after him "Amen" in a loud voice, and all the people are silent until he finishes his blessings. And the Exilarch opens and expounds on the matter of the weekly Torah portion of that day, or gives permission to the head of Sura to open and expound, and the head of Sura gives permission to the head of Pumbedita, and they honor each other until the head of Sura opens, and a translator stands over him and announces his words to the people.
And he expounds with fear, closing his eyes and wrapping himself in a tallit covering his forehead, and there shall not be in the congregation when he expounds one who opens his mouth and chirps and speaks a word. And when he senses someone speaking, he opens his eyes and fear and trembling falls upon the congregation. And when he finishes, he begins with a question and says "Bar so-and-so needs such and such teaching," and an elder, an established man, stands and responds as to the matter and sits.
And the cantor stands and says Kaddish, and when he reaches "in your lives and in your days," he says "in the life of our Nasi, the Exilarch, and in your lives and in the life of all the house of Israel." And when he finishes the Kaddish, he blesses the Exilarch, and then blesses the heads of academies. And when he says the blessing, he stands and says "From the city so-and-so and all its daughters, so-and-so much comes from them," and he mentions all the academies that send to the academy and blesses each one.
So he blesses the people who are occupied with communal needs until it reaches the academies. And then they bring out the Torah scroll, and a Kohen reads and after him a Levi, and the cantor shows the Torah scroll to the Exilarch, and all the people stand, and he receives the Torah scroll from his hand and stands and reads from it. And the heads of academies stand with him, and the head of Sura translates over him.
And he returns the Torah scroll to the cantor and he returns it to the ark. And when it reaches the ark, he sits in his place and all people sit in their places. And after him the heads of Kallah read, and after them the students of the heads of academies. But the heads of academies themselves do not read from the Torah scroll on that day because another preceded them.
And when the one who reads the Haftarah finishes, a great and wealthy man stands and translates over him, and he gains praise and honor in this matter. And when he finishes, he adds to bless the Exilarch with a Torah scroll, and all the cantors who are accustomed and expert in prayer stand around the ark and say "Amen." And then he blesses the two heads of academies, and returns the Torah scroll to its place, and they pray Musaf and go out.
And when the Exilarch goes out, all the people go out before him and after him and say before him words of songs and praises until he reaches his house. But the heads of academies do not go with him to his house. And all the students who go with him and accompany him to his house - he does not leave any of them who came from his house for seven days, and from that time and onwards he does not go out of the entrance of his house, and the people gather and pray with him always, on weekdays, Sabbaths, and holidays.
And if he wants to go out and do his needs, he rides in a carriage, the second chariot like the chariots of the king's ministers, in beautiful garments, and up to 15 people go after him, and his servant runs after him. And when he passes by one of Israel, they run to him and hold his hands and turn his face, and so does every Jew he passes until up to 50 or 60 gather around him until the place where he goes.
And when he returns to his house, they do likewise for him. And he never goes out until all his group and entourage go after him, and in his walking he is like one of the king's ministers. And when he wants to enter before the king to ask something of him or to see his face, he asks the king's ministers and servants who enter before him always to speak to the king to give him permission to enter before him, and he gives him permission to the gatekeepers to let him in.
And when he enters, all the king's servants run before him, and he has prepared in his bosom golden dinars and zuzim to give to those servants who run before him until he enters. And he puts his hand in his bosom and gives to each one something that God provides him. And they honor him and hold his hand until he comes and stands before the king, and he bows to him. And the king gestures to him that he should stand on one foot and lean on the second until the king gestures to two of his servants about him and they take his hand and seat him in the place the king gestured to seat him.
And then he speaks with the king, and the king asks him about his welfare and his matters and why he came before him, and he asks permission from him to speak before him, and he permits him. And then he begins with praises and blessings prepared for him beforehand, and he arranges before him the custom of his fathers and forefathers and appeases him with pleasant words until he does his request and gives him his petition and writes for him everything he asked of him.
And he goes out from there and departs in joy and peace. [This continues at great length...]