9. Humayd ibn Ziyad has narrated from al-Hassan ibn Muhammad from Ja’far ibn Sama‘ah from Aban ibn ‘Uthman from ‘Isma’il ibn al-Fadl who has said the following:

“This is concerning my question before abu ‘ Abd Allah , about the case of a man who says to another man, ‘Send your sheep and camels to be kept and when they give birth, if you like, I will exchange their male with female or vice versa.’ He (the Imam) said, ‘It is a detestable act unless the exchange takes place after they give birth and he knows them, which is which.’”