The Prophet (ﷺ) said: If anyone is given a legal decision ignorantly, the sin rests on the one who gave it. Sulayman al-Mahri added in his version: If anyone advises his brother, knowing that guidance lies in another direction, he has deceived him. These are the wordings of Sulayman.
Reference: Sunan Abi Dawud 3657 In-book : Book 26, Hadith 17 English translation : Book 25, Hadith 3649
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