Al Hasan Ibn Salih Ibn Hayy

Al-Hasan ibn Salih ibn Hayy, a jurist and theologian, whom Ibn al-Nadim counts among the great Zaydi Shi'is and their scholars. ²

He was born in 100 AH and died in hiding in 167 AH according to al-Shirazi's report, though it is said 168 AH. The disagreement is recorded in the museum's data, with the date of death marked as disputed. ³ Ibn al-Nadim says his death was in 168 AH. ²

He wrote the book "Tawhid", a book on the imamate of the descendants of Ali through Fatima, and the book "al-Jami' fi al-Fiqh". He had two brothers who shared his school, Ali ibn Salih and Salih ibn Salih, and Ali was a theologian. ²