The Book of Occultation — al-Ṭūsī · Hadith 380 (#Ḥadīth #29)

وأما من قال لا ولد لأبي محمد عليه السلام فقوله يبطل بما دللنا عليه من إمامة الاثني عشر وسياقة الأمر فيهم. ويزيده بيانا:

As for the assertion that Imam Hasan Askari did not have a son, it is invalid, because we proved that the Imams are twelve and this divinely ordained authority is bestowed to them. There are some more reports on this topic, which we mention below:

Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).