Whoever is given

Abu Huraira reported: The Messenger of Allah, peace be upon him, said, “Whoever is given a judgment not based upon knowledge, his sin falls upon the one who gave him the judgment.” Sulaiman added, “One who gives advice to his brother while knowing what is better lies elsewhere, he has betrayed him.”
[Sunan Abu Dawud, Book 24, Number 3657]

أَبَا هُرَيْرَةَ يَقُولُ  قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَنْ أُفْتِيَ بِغَيْرِ عِلْمٍ كَانَ إِثْمُهُ عَلَى مَنْ أَفْتَاهُ زَادَ سُلَيْمَانُ الْمَهْرِيُّ فِي حَدِيثِهِ وَمَنْ أَشَارَ عَلَى أَخِيهِ بِأَمْرٍ يَعْلَمُ أَنَّ الرُّشْدَ فِي غَيْرِهِ فَقَدْ خَانَهُ

سنن أبي داود كتاب العلم باب التوقي في الفتيا