The Book of the Sunnah
0/8. Chapter:
Avoiding individual opinion and analogy (with regard to matters of religion)
Sunan Ibn Majah
حَدَّثَنَا الْحَسَنُ بْنُ حَمَّادٍ، سَجَّادَةُ حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ الأَمَوِيُّ، عَنْ مُحَمَّدِ بْنِ سَعِيدِ بْنِ حَسَّانَ، عَنْ عُبَادَةَ بْنِ نُسَىٍّ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ غَنْمٍ، حَدَّثَنَا مُعَاذُ بْنُ جَبَلٍ، قَالَ لَمَّا بَعَثَنِي رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ إِلَى الْيَمَنِ قَالَ " لاَ تَقْضِيَنَّ وَلاَ تَفْصِلَنَّ إِلاَّ بِمَا تَعْلَمُ فَإِنْ أَشْكَلَ عَلَيْكَ أَمْرٌ فَقِفْ حَتَّى تُبَيِّنَهُ أَوْ تَكْتُبَ إِلَىَّ فِيهِ " .
Mu'adh bin Jabal said: "When the Messenger of Allah (ﷺ) sent me to Yemen, he said: 'Do not pass any judgment or make any decision except on the basis of what you know. If you are uncertain about a matter, wait until you understand it fully, or write to me concerning it.'" (Maudu')
Reference : Sunan Ibn Majah 55In-book reference : Introduction, Hadith 0English translation : Vol. 1, Book 1, Hadith 55