I asked: Messenger of Allah, what will remove from me the obligation due for fostering a child? He said: A slave or a slave-woman.
Sunan Abi Dawud Book 12, Hadith 19
← Previous Hadith A’ishah reported “The Apostle of Allaah(ﷺ) as saying One or two sucks does not make marriage unlawful”.

Sunan Abi Dawud Book 12, Hadith 18 Next Hadith → Abu Hurairah reported The Apostle of Allaah(ﷺ) as saying “ A woman should not be married to one who had married her paternal aunt or a paternal aunt to one who had married her brother’s daughter or a woman to one who had married her maternal aunt or maternal aunt to one who had married her sister’s daughter. A woman who is elder (in relation) must not be married to one who had married a woman who is younger (in relation) to her nor a woman who is younger (in relation) must be married to one who has married a woman who is elder (in relation) to her.”

Sunan Abi Dawud Book 12, Hadith 20