Urwah narrates, in naming those of the Ansar who were present at the pledge of al-Aqabah, then of al-Aws, of Banu Abd al-Ashhal: Abu al-Haytham bin al-Tayyihan, who was a naqib (leader), and he also took part in Badr, and he was the first person to give the pledge upon Islam at al-Aqabah.
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 16612