If (some people have to take an oath) and each of them wants to take it first Sahih al-Bukhari 2674
Arabic hadith text
حَدَّثَنَا إِسْحَاقُ بْنُ نَصْرٍ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنْ هَمَّامٍ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ أَنَّ النَّبِيَّ صلى الله عليه وسلمعَرَضَ عَلَى قَوْمٍ الْيَمِينَ فَأَسْرَعُوا، فَأَمَرَ أَنْ يُسْهَمَ بَيْنَهُمْ فِي الْيَمِينِ أَيُّهُمْ يَحْلِفُ.
Translation
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.