And Yitzchak was thirty-seven years old and Yishmael his brother was walking with him in the tent. And he boasted, saying, "When I was twelve years old, when my father spoke to me to circumcise me, I did not disobey his word." And Yitzchak answered, "Why do you boast about a little piece of flesh from your body? As HaShem, the God of my father, lives, if HaShem were to say to my father, 'Take Yitzchak and offer him as a burnt offering,' I would not hold back my soul and I would do the matter with joy." And the matter was pleasing in the eyes of HaShem, and He said to test Avraham with this matter. [continued at length describing the Satan's attempts to dissuade Avraham and Yitzchak, Sarah's emotional farewell to Yitzchak, the journey to Mount Moriah, the Akeidah itself, the angels' pleas for mercy, and Sarah's death upon hearing about the Akeidah from the Satan who appeared to her disguised as an old man.
The passage includes many rabbinic sources and concludes with Sarah crying three cries corresponding to the three blasts of the shofar, and her soul departing. (Sefer HaYashar, Pirkei DeRabbi Eliezer chapter 31)]