"I said to Salamah bin Al-Akwa': "For what did you pledge to the Messenger of Allah ﷺ on the Day of Al-Hudaibiyyah?" He said: "For death." This Hadith is Hasan Sahih.
قُلْتُ لِسَلَمَةَ بْنِ الأَكْوَعِ عَلَى أَىِّ شَيْءٍ بَايَعْتُمْ رَسُولَ اللَّهِ ﷺ يَوْمَ الْحُدَيْبِيَةِ قَالَ عَلَى الْمَوْتِ هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ