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bukhari:4175Muḥammad b. Bashhār > Ibn Abū ʿAdī > Shuʿbah > Yaḥyá b. Saʿīd > Bushayr b. Yasār

who was one of those who witnessed (the Pledge of allegiance beneath) the Tree: Messenger of Allah ﷺ and his companions were given Sawiq and they chewed it.  

البخاري:٤١٧٥حَدَّثَنِي مُحَمَّدُ بْنُ بَشَّارٍ حَدَّثَنَا ابْنُ أَبِي عَدِيٍّ عَنْ شُعْبَةَ عَنْ يَحْيَى بْنِ سَعِيدٍ عَنْ بُشَيْرِ بْنِ يَسَارٍ

عَنْ سُوَيْدِ بْنِ النُّعْمَانِ وَكَانَ مِنْ أَصْحَابِ الشَّجَرَةِ كَانَ رَسُولُ اللَّهِ ﷺ وَأَصْحَابُهُ أُتُوا بِسَوِيقٍ فَلاَكُوهُ  

تَابَعَهُ مُعَاذٌ عَنْ شُعْبَةَ