Hasan bin ur-Rabī’ narrated to us, Hammād bin Zayd narrated to us, on authority of Ayyūb and Hishām , on authority of Muhammad ; and Fuḍayl narrated to us on authority of Hishām ; he said Mukhlad bin Husayn narrated to us, on authority of Hishām , on authority of Muhammad bin Sīrīn , that he said: ‘Indeed this knowledge is faith, so carefully consider from whom you take your faith’.