"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."  

أَنَّ رَسُولَ اللَّهِ ﷺ بَعَثَ مُعَاذًا إِلَى الْيَمَنِ فَقَالَ كَيْفَ تَقْضِي فَقَالَ أَقْضِي بِمَا فِي كِتَابِ اللَّهِ قَالَ فَإِنْ لَمْ يَكُنْ فِي كِتَابِ اللَّهِ قَالَ فَبِسُنَّةِ رَسُولِ اللَّهِ ﷺ قَالَ فَإِنْ لَمْ يَكُنْ فِي سُنَّةِ رَسُولِ اللَّهِ ﷺ قَالَ أَجْتَهِدُ رَأْيِي قَالَ الْحَمْدُ لِلَّهِ الَّذِي وَفَّقَ رَسُولَ رَسُولِ اللَّهِ ﷺ  

(Another chain of narrators) from some people from the inhabitants of Hims, from Mu'adh, from the Prophet ﷺ, with similar.  

عَنِ النَّبِيِّ ﷺ نَحْوَهُ