Sahih al-Bukhari 7278
Sahih al-Bukhari · Book 96: Holding Fast to the Qur'an and Sunnah · Following the Sunna of the Prophet (saws)
Narrated Abu Huraira and Zaid bin Khalid:
حَدَّثَنَا مُسَدَّدٌ ، حَدَّثَنَا سُفْيَانُ ، حَدَّثَنَا الزُّهْرِيُّ ، عَنْ عُبَيْدِ اللَّهِ ، عَنْ أَبِي هُرَيْرَةَ ، وَزَيْدِ بْنِ خَالِدٍ ، قَالاَ كُنَّا عِنْدَ النَّبِيِّ صلى الله عليه وسلم فَقَالَ " لأَقْضِيَنَّ بَيْنَكُمَا بِكِتَابِ اللَّهِ " .
We were with the Prophet (ﷺ) when he said (to two men), "I shall judge between you according to Allah's Book (Laws)."