The oath must be taken by the defendant
that the Prophet ﷺ said, "If the people were given according to their claims, they would claim the lives of persons and their properties, but the oath must be taken by the defendant."
أَنَّ النَّبِيَّ ﷺ قَالَ: «لَوْ يُعْطَى النَّاسُ بِدَعْوَاهُمْ لاَدَّعَى نَاسٌ دِمَاءَ رِجَالٍ وَأَمْوَالَهُمْ وَلَكِنَّ الْيَمِينَ عَلَى الْمُدَّعَى عَلَيْهِ۔»