Is it true that there are very few narrations in our collections from Ismail, the son of Imam Ja'far al-Sadiq, and from his son Muhammad ibn Ismail? If so, what is the reason?
We have in our main books of Hadeeth two narrations from Esma'eel son of Imam Ja'far Al-Sadiq (AS); one in Al-Kaafi by Al-Kulaini , volume 7, page 388, and the second narration is in Al-Tahtheeb by Al-Shaikh Al-Tousi, volume 6, page 287. The reason can be because he passed away during the life of his father when people used to take the Hadeeths from Imam Ja'far Al-Sadiq (AS) himself.
I did not find any narration in our main books from Muhammad ibn Esma'eel who was in touch with the Abbasid tyrant Haroon Al-Rasheed who put imam Musa A;-Kadhim (AS) in jail for long years then killed him by poison.
Wassalam.