Sayyiduna Abu Razin (may Allah be pleased with him) reports: Sayyiduna Abbas (may Allah be pleased with him) was asked: Who is the elder, you or the Prophet (peace and blessings be upon him)? He replied: He is greater than me, but I was born before him. The narrator says: Sayyiduna Abbas (may Allah be pleased with him) was older than the Prophet (peace and blessings be upon him); he was born three years before the Year of the Elephant.
Al-Tabarani recorded it, and its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 15482