الكافي- ط الاسلامية, volume 5, page 440

1. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ibn Mahbub from ‘Abd Allah ibn Sinan who has said the following: “This is concerning my question before abu ‘Abd Allah (a.s.), about the milk of ‘impregnating agent’. He (the Imam) said, ‘It is the milk from your wife from your milk and the milk of your children given to the child of another woman and that child is unlawful (for marriage).”’

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

2. Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from ‘Uthman ibn ‘Isa from Sama‘ah who has said the following: “This is concerning my question before abu ‘Abd Allah (a.s.), about the case of a man who has two women, each of whom gives birth; and he divorces one of the two who has breastfed a girl of the people; if the son of this man can marry that girl. He (the Imam) said, ‘No, because she has given milk from the milk of the shaykh (man of the family).”’

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

3. Ali ibn Ibrahim has narrated from his father from ibn abu Najran from ‘Abd Allah ibn Sinan who has said the following: “This is concerning my question before abu ‘Abd Allah (a.s.), about the milk of ‘impregnating agent’. He (the Imam) said, ‘It is the milk from your wife from your milk and the milk of your children given to the child of another woman and that child is unlawful (for marriage).”’

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

4. A number of our people have narrated from Sahl ibn Ziyad and Ali ibn Ibrahim has narrated from his father from Ahmad ibn Muhammad from ibn abu Nasr who has said the following: “I once asked abu al-Hassan (a.s.), about the case of a woman who breastfeeds a girl and her husband has a son from another woman if it is lawful for this boy, the son of her husband to marry the girl she has breastfed. He (the Imam) said, ‘The milk is from ‘impregnating agent’ her husband.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

5. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from al-Hassan ibn Mahbub from Jamil ibn Salih from abu Basir who has said the following: “About the case of a man who marries a woman who gives birth from him to a girl, then the woman dies and he marries another woman who gives birth to a boy, then she breastfeeds a boy; if this boy can marry the daughter of the woman who was the wife of the man before this woman. He (the Imam) said, ‘I do not like for him to marry the daughter of the ‘impregnating agent’ from whose milk he is breastfed.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.