Salamah ibn al-Akwaʿ (may Allah be pleased with him) is reported by Yazīd ibn Abī ʿUbayd, who said: I asked Salamah ibn al-Akwaʿ, “On what did you pledge allegiance to the Messenger of Allah (ﷺ) ﷺ on the day of al-Ḥudaybiyah?” He said, “We pledged to him upon death.” Reference: Musnad Aḥmad 281