I said, "Messenger of Allah, why do I see you carefully selecting from Quraysh while leaving us aside?"He replied, "Do you have someone in mind?"I said, "Bint Hamza."He said, "She is the daughter of my brother through breastfeeding."
حدثنا ابن نمير حدثنا الأعمش عن سعد بن عبيدة عن أبي عبد الرحمن
قلت يا رسول الله ما لي أراك تنوق في قريش وتدعنا قال عندك شيء قلت بنت حمزة قال هي بنت أخي من الرضاعة
Its isnad is sahih. In H and K, it reads "Saeed bin Ubayda," which is a mistake, the correct reading is "Saad bin Ubayda." The hadith is a repetition of 620, and see also 770, 857, 931. It will come again at 1333 from Muhammad bin Abu Adi from Muhammad bin Ishaq, with the correct reading that we have preferred.