Scientifically the best food for the baby is that of the mother's milk...

Scientifically the best food for the baby is that of the mother's milk, in addition through breast feeding the child will feel secured, safe and protected. But in exceptional situations which affect the breast feeding like insufficient milk of the mother or her sickness or loosing her either by divorce or death, the Ahlulbait (peace be upon them) has laid emphasis on choosing a suitable and appropriate foster mother base on the specified attributes.

The commander of the faithful (peace be upon him) said: "Observe her who gives breast feeding to your children because the child grows on it"[^12]. The milk and the type of the foster mother have effect on the child in terms of his physical and psychological growth. Verily an experience has established the teachings of the Ahlulbait (peace be upon them) in this aspect. There are some attributes while choosing the foster mother that has been approved by the Ahlulbait (peace be upon them).

Imam Mohammad Al-Baqir (peace be upon him) said: "Breast feed your child with good milk and be aware of bad milk because milk transits"[^13]. He (peace be upon him) said: "Be aware of pure wet nurse because milk transits" [^14] Prohibition came from breast feeding child by some foster mother. Imam Jaafar Assadiq (peace be upon him) forbids breast feeding from Magians.

From the authority of Abdullah bn Halal, he said, I asked him about magian wet nurse, "he said, no but the people of the book" [^15] He conditioned breast feeding with the women of the book by preventing them from drinking wine. He said: "If they breast feed for you, prevent them from taking wine"[^16].

On the authority of Ali bn Jaafar, from Imam Musa bn Jaafar Al-kazim (peace be upon them) he said: I asked him, is it polite for a Muslim men to employed women Jews and Christian for breast feeding while they drink wine? He (peace be upon him) said: "Prevent them from taking wine hence they breast feed for you"[^17].

Imam Jaafar Assadiq (peace be upon him) prohibits breast feeding from a prostitute whose milk originates from fornication, he (peace be upon him) also said: "Don't seek breast feeding from her and her daughter"[^18]. Imam Mohammad Al-Baqir (peace be upon him) said: "The milk of a Jews, magian and a Christian is more preferable to me than that of fornicator child's milk"[^19].