It is Musa ibn Ja’far (s) who prostrates every day from sunrise until noon.

It is Musa ibn Ja’far (s) who prostrates every day from sunrise until noon.” Al-Rabee’ said, “Harun told me, ‘He is one of the monastic members of the Hashemites.’ I said, ‘Then why do you treat him with such harshness in prison?’ Harun said, ‘I wish it wasn’t so! I have no other choice.’”