The Holy Prophet ﷺ said to a man whom he asked to take an oath: Swear by Allah except whom there is no god that you have nothing belonging to him, i.e. the plaintiff.  

أَنَّ النَّبِيَّ ﷺ قَالَ يَعْنِي لِرَجُلٍ حَلَّفَهُ احْلِفْ بِاللَّهِ الَّذِي لاَ إِلَهَ إِلاَّ هُوَ مَا لَهُ عِنْدَكَ شَىْءٌ يَعْنِي لِلْمُدَّعِي