Sayyiduna Anas (may Allah be pleased with him) narrates: The Prophet Muhammad (peace and blessings be upon him) said: "The Quraysh are close to the time of ignorance, so I intended to make them feel at ease." Then the Prophet Muhammad (peace and blessings be upon him) said to them: "Is there anyone among you besides yourselves?" The people replied: "We have a nephew." So the Prophet Muhammad (peace and blessings be upon him) said: "A people's nephew is considered part of them."
Hadith Referenceصحیح ابن حبان / كتاب السير / 4501
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «الصحيحة» (776)، «الروض النضير» (961): ق.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرطهما