محمد بن علي الباقر عليه السلام

"Choose healthy wet nurses, for milk can transmit illness."

“Abu Ja‘far (a.s.), has said, ‘The milk of a Jewish, a Christian or a Zoroastrian woman is more likeable to me than the milk of a woman because of fornication.’ He (the Imam) would not consider it unlawful if the breastfeeding woman is a slave-girl who has committed fornication and her master gives permission.”

"If a man marries a young girl (jariyah) who is still nursing, and his wife then breastfeeds her, the marriage becomes invalid."

a man came to Imam Ali ibn Abi Talib (as) and said: "My bondwoman has breastfed my child, and I want to sell her." Imam (as) replied: "Take her by the hand and say, 'Who will buy from me the mother of my child?'"

"The milk of a Jewish, Christian, or Magian woman is more beloved to me than the milk of a child born from adultery. However, he saw no harm in the milk of a child born from adultery if the master of the bondwoman, with whom the immoral act was committed, pardons it."

Messenger of Allah (swt) (peace be upon him and his family) said: "There is no breastfeeding after weaning, no continuous fasting without breaking, no orphanhood after reaching puberty, no silence for a day until night, no returning to a Bedouin life after migration, no migration after the conquest (of Mecca), no divorce before marriage, no emancipation before ownership, no oath for a child in the presence of their parent, nor for a slave with their master, nor for a woman with her husband, no vow in disobedience, and no oath in severing family ties."

"Any wet nurse of a people who accidentally kills their child while sleeping - by rolling over and causing the child's death - the blood money is to be paid from her personal wealth if she took on nursing for the sake of pride and honor. However, if she undertook nursing due to poverty, then the blood money is upon her family ('Aqilah)."

“Abu Ja‘far (a.s.), has said, ‘You must find a clean breastfeeding woman because milk may spread (its bad effects).”’

Messenger of Allah (swt) (peace and blessings be upon him and his family) said: "Do not choose a foolish woman as a wet nurse, for milk can transmit traits. A child is influenced by the milk, meaning by the wet nurse, in foolishness and ignorance."

“This is a narration of abu Ja‘far (a.s.), from the Messenger of Allah, O Allah, grant compensation to Muhammad and his family worthy of their services to Your cause. He (the Messenger of Allah) has said, ‘You must not hire a dimwitted woman for breastfeeding; the milk spreads and the boy is drawn to the milk, that is, to the frivolity and dimwittedness of the breastfeeding woman.’”