(15) بَابُ مَنَاقِبُ سَعْدِ بْنِ أَبِي وَقَّاصٍ الزُّهْرِيِّ وَبَنُو زُهْرَةَ أَخْوَالُ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ وَهْوَ سَعْدُ بْنُ مَالِكٍ
Narrated Sa`d:
No doubt, (for some time) I stood for one-third of the Muslims.
Reference: Sahih al-Bukhari 3726
In-book reference: Book 62, Hadith 74
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 5, Book 57, Hadith 72