"How will you judge?" He said: "I will judge according to what is in Allah's Book." He said: "If it is not in Allah's Book ?" He said: "Then with the Sunnah of the Messenger of Allah (ﷺ)." He said: "If it is not in the Sunnah of Messenger of Allah (ﷺ)?" He said: "I will give in my view." He said: "All praise is due to Allah, the One Who made the messenger of the Messenger of Allah suitable."
Jami` at-Tirmidhi Book 15, Hadith 7
← Previous Hadith "When the judge passes a judgement in which he strived and was correct, then he receives two rewards. And when he judges and is mistaken, then he receives one reward."

Jami` at-Tirmidhi Book 15, Hadith 6 Next Hadith → (Another chain of narrators) from some people from the inhabitants of Hims, from Mu'adh, from the Prophet (ﷺ), with similar.

Jami` at-Tirmidhi Book 15, Hadith 8