Ibn ‘Abbas told that the Prophet said to a man whom he had asked to take an oath, “Swear by God than Whom there is no god that you have nothing belonging to him,” i.e. the plaintiff. Abu Dawud transmitted it.
Hadith Referenceمشكوة المصابيح / كتاب الإمارة والقضاء / 3774
Hadith Gradingالألبانی:لم تتمّ دراسته | زبیر علی زئی:حسن
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «حسن، رواه أبو داود (3620)»