Merits of the Helpers in Madinah (Ansaar)
حَدَّثَنِي إِبْرَاهِيمُ بْنُ مُوسَى، أَخْبَرَنَا هِشَامٌ، أَنَّ ابْنَ جُرَيْجٍ، أَخْبَرَهُمْ قَالَ عَطَاءٌ قَالَ جَابِرٌ أَنَا وَأَبِي، وَخَالِي، مِنْ أَصْحَابِ الْعَقَبَةِ.Narrated Jabir:My father, my two maternal uncles and I were among those who took part in the 'Aqaba Pledge
From Sahih al-Bukhari, whose reports the scholars accept as authentic.