Sayyidah Aisha Siddiqa (may Allah be pleased with her) narrates: Sahla bint Suhail came to the service of the Prophet Muhammad (peace and blessings be upon him). She said: O Messenger of Allah (peace and blessings be upon him)! Salim is called the adopted son of Abu Hudhaifah, he stays with them, he also comes to me, he sees me (without a head covering, etc.), our house is also small, and Allah Almighty has said: "Call them by (the names of) their (real) fathers; that is more just in the sight of Allah." So the Prophet Muhammad (peace and blessings be upon him) said: Give him your milk to drink, you will become unlawful (for marriage) to him.
Hadith Referenceصحیح ابن حبان / كتاب الرضاع / 4214
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «صحيح أبي داود» (1799): ق.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرطهما