Sahih Bukhari · Hadith 4215
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi) - كتاب المغازى
حدثنا موسى، حدثنا أبو عوانة، حدثنا طارق، عن سعيد بن المسيب، عن أبيه، أنه كان ممن بايع تحت الشجرة، فرجعنا إليها العام المقبل فعميت علينا.
Narrated Sa`id bin Al-Musaiyab: That his father was amongst those who had given the Pledge of allegiance (to the Prophet ) beneath the Tree, and the next year when they went towards the Tree, they were not able to recognize it.
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).