If (some people have to take an oath) and each of them wants to take it first

Sahih al-Bukhari · Book 52 · Hadith 2674

حَدَّثَنَا إِسْحَاقُ بْنُ نَصْرٍ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنْ هَمَّامٍ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ أَنَّ النَّبِيَّ صلى الله عليه وسلم عَرَضَ عَلَى قَوْمٍ الْيَمِينَ فَأَسْرَعُوا، فَأَمَرَ أَنْ يُسْهَمَ بَيْنَهُمْ فِي الْيَمِينِ أَيُّهُمْ يَحْلِفُ‏.‏

Narrated Abu Huraira: The Prophet (ﷺ) asked some people to take an oath, and they hurried for it. The Prophet (ﷺ) ordered that lots should be drawn amongst them as to who would take an oath first.