Ruling of Breastfeeding

Once the Messenger of Allah (may Allah's peace and blessings be upon him) entered upon me while a man was in my house. He said: O ‘Ā'ishah, who is this (man)? I replied: He is my brother from breastfeeding. He said: O ‘Ā'ishah, be careful who you (women) count as your brothers from breastfeeding, for the breastfeeding (that makes marriage prohibited) is only that which satisfies hunger

‘Ā'ishah (may Allah be pleased with her) reported: Once the Messenger of Allah (may Allah's peace and blessings be upon him) entered upon me while a man was in my house. He said: "O ‘Ā'ishah, who is this (man)?" I replied: "He is my brother from breastfeeding." He said: "O ‘Ā'ishah, be careful who you (women) count as your brothers from breastfeeding, for the breastfeeding (that makes marriage prohibited) is only that which satisfies hunger (takes place in the suckling period, the first two years of one's life)."