It is reported about Sayyiduna Abdullah bin al-Zubayr (may Allah be pleased with them both) and Sayyiduna Abdullah bin Ja'far (may Allah be pleased with him) that both of them gave the pledge of allegiance (bay'ah) to the Prophet (peace and blessings be upon him) at the age of seven. When the Prophet (peace and blessings be upon him) saw the two of them, he smiled, extended his blessed hand and took the pledge from both of them.
Imam al-Tabarani recorded this narration in al-Mu'jam al-Awsat and al-Mu'jam al-Kabir; its chain contains Isma'il bin Ayyash, about whom there is disagreement, and the rest of its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 15538
Sayyiduna Abdullah bin Ja'far (may Allah be pleased with him) narrates: I remember myself, Qutham and Ubaydullah, the two of them being sons of Sayyiduna al-Abbas (may Allah be pleased with him), when we were children playing. Meanwhile the Prophet (peace and blessings be upon him) passed by us and said: Lift this one up to me! The Prophet (peace and blessings be upon him) seated me in front of him. Then he said about Sayyiduna Qutham: Lift this one up to me, and he seated him behind him. Ubaydullah was dearer to Sayyiduna al-Abbas (may Allah be pleased with him) than Qutham, yet the Prophet (peace and blessings be upon him) felt no awkwardness before his uncle in taking Qutham and leaving Ubaydullah. Then the Prophet (peace and blessings be upon him) passed his hand over my head three times, and each time he did so he prayed: O Allah, take the place of Ja'far in caring for his children! The narrator says: I asked Sayyiduna Abdullah bin Ja'far (may Allah be pleased with him): What became of Sayyiduna Qutham (may Allah be pleased with him)? He said that he was martyred. I said: Allah and His Messenger knew best what was good. Sayyiduna Abdullah (may Allah be pleased with him) replied: Yes!
Imam Ahmad recorded this narration, and its narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 15539
Amr bin Hurayth narrates: Once the Prophet (peace and blessings be upon him) passed by Sayyiduna Abdullah bin Ja'far (may Allah be pleased with him), who was playing at buying and selling with the children, and the Prophet (peace and blessings be upon him) said: "O Allah, bless him in his buying and selling! (The narrator is unsure; perhaps the words are:) in his deal."
Imam Abu Ya'la and Imam al-Tabarani recorded this narration, and the narrators of both are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 15540
Muhammad bin Abdullah bin Numayr narrates: In that year Sayyiduna Abdullah bin Ja'far bin Abi Talib (may Allah be pleased with him) passed away in Madinah; his kunyah was Abu Ja'far. The narrator says: This refers to the year 80 AH.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 15541