Sahih Muslim – Hadith No : 4698

It has been narrated on the authority of Hisham (who learnt it from his father) that the Messenger of Allah (may peace be upon him) said (to Sa’d): You have adjudged their case with the judgment of God. the Exalted and Glorified.

Hadith In Arabic Text :

وحدثنا أبو كريب، حدثنا ابن نمير، حدثنا هشام، قال قال أبي فأخبرت أن رسول الله صلى الله عليه وسلم قال ‏”‏ لقد حكمت فيهم بحكم الله عز وجل ‏”‏ ‏.‏

Chapter : The Book of Jihad and Expedition – كتاب الجهاد والسير