Mishkat al-Masabih #226
Knowledge
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ أَفْتَى بِغَيْرِ عِلْمٍ كَانَ إِثْمُهُ عَلَى مَنْ أَفْتَاهُ وَمَنْ أَشَارَ عَلَى أَخِيهِ بِأَمْرٍ يَعْلَمُ أَنَّ الرُّشْدَ فِي غَيْرِهِ فَقَدْ خانه» . رَوَاهُ أَبُو دَاوُد
Abu Huraira reported God’s messenger as saying, “If anyone is
given a legal decision ignorantly, the sin rests on the one who gave it;
and if anyone advises his brother, knowing that right guidance lies in
another direction, he has deceived him.” Abu Dawud transmitted it.
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About Mishkat al-Masabih
This hadith is #226 from Mishkat al-Masabih, in the Book of Knowledge.