Mishkat al-Masabih 2 Knowledge كتاب العلم 38

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.