Syedna Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: Whoever attributes to me something which I have not said, let him prepare his abode in the Fire. Whoever is consulted by his Muslim brother, but gives him advice without wisdom and uprightness, then he has betrayed him. And whoever gives a legal verdict without proper investigation, then its sin will be upon the one who gave the verdict.
Hadith Referenceالفتح الربانی / كتاب آفات اللسان / 9970
Hadith Gradingمحدثین:صحیح
Hadith Takhrij«حسن، قاله الالباني، أخرجه ابوداود: 3657، وابن ماجه: 53 ، (انظر مسند أحمد ترقيم الرسالة: 8266 ترقیم بيت الأفكار الدولية: 8249»
Brief Explanation
Benefits: … Those who give advice and legal opinions (fatwa) should remain alert; only such advice should be given in which there is good and benefit for the Muslim, and a legal opinion (fatwa) regarding matters related to the Shari‘ah should be given only after complete investigation, effort, and after reaching certainty or a predominant assumption (zann ghalib).