David [and Yonatan were a reincarnation of one (Nazir Limud, arrangement 2). The wife of On ben Pelet who saved her husband was reincarnated in Michal daughter of Shaul, and she saved David (Bereishit Nezer) - see Year 3410. The wife of Achish and his daughter were silenced, as it says "He who lacks madness, do I need" - one was the daughter of a king who was silenced in the incident of R' Akiva (see there), and the second in the incident of the king's daughter with the Rashbi (see there).
And in the building student (Bereishit Nezer), Naval was a reincarnation of Bilam (end of Bereishit Nezer) - see Year 2488. Naval was a reincarnation of Lavan (Sefer Kavvanot HaAri, chapter 5). Just as Yaakov guarded the flock of Lavan, so David guarded the flock of Naval (ibid.).
Therefore the second Yud is missing. Avigayil, whose name says "until Naval is my father" - and it was a secret for Leah (writings of the Ari) - see Year 108 for Lavan and Bilam. Avigayil was a reincarnation of Leah (Sefer HaKavvanot in Likutei Trei Asar).
Therefore David guarded the flock of Naval just as Yaakov guarded the flock of Lavan (see Vayetze, Hei, 5) and Bilam (see Parshat Balak). And he was reincarnated in Palimo (see there). Naval was reincarnated in Barzilai HaGiladi, therefore he gave to David and his men to eat, to rectify what in the first reincarnation he did not give (Nazir 78). Bilam was reincarnated in Barzilai, and the root of Barzilai's soul was also in Kamtza himself, and this is "and my end shall be like his" - that the end of Bilam was like Kamtza (Sefer HaKavvanot).
Uzza and Yehido, God, upon the cart. And regarding Avner it is written "to speak to him in peace" - and He struck him in the fifth [rib], for here was added the spirit of Uzza upon Avner, for the judgment was on the shoulder of Yishai, therefore he did not have long life and was killed (Bereishit Nezer). Uziya was his reincarnation (see Year 3115). He counted Israel and Yosef also 5 (end of Shmuel).
Aravna was a spark of Malki-Tzedek who blessed Avraham, and Aravna blessed David - this one was king in Yerushalayim and this one was great over the place of the Temple. And he was a rectification of Efron who sold the Cave of Machpelah and was stingy, and here he was rectified through generosity (Bereishit Nezer)].