Mishkat al-Masabih 18 The Offices of Commander and Qadi كتاب الإمارة والقضاء 104

وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَرَضَ عَلَى قَوْمٍ الْيَمِينَ فَأَسْرَعُوا فَأَمْرَ أَنْ يُسْهَمَ بَيْنَهُمْ فِي اليَمينِ أيُّهُمْ يحْلِفُ. رَوَاهُ البُخَارِيّ

Abu Huraira told that the Prophet suggested to some people that they should swear an oath and when they hastened to do so he ordered that lots should be cast among them concerning the oath as to who should swear it. Bukhari transmitted it.