Know – may Allah, exalted is He, grant you success – that what is obligatory upon everyone who is aware of the distinction between the Sahīh transmissions and their weak, the trustworthy narrators from those who stand accused, is to not transmit from them except what is known for the soundness of its emergence and the protection of its narrators; and that they fear what may be from those accused (of deficiency in narrating) and the stubborn people of innovation.The proof that what we have said is required above what opposes it is in the verse: {Oh you who believe! If a sinful person comes to you with news, then verify it lest you afflict people through ignorance then you become sorry about what you did}[al-Hujurāt: 6]; and the verse: {… from whom you are pleased with from the witnesses}[al-Baqarah: 282] and the verse: {And let two who possess integrity among you bare witness}[at-Talāq: 2]. Thus it demonstrates what we mentioned from these two verses that the report of the sinful is dropped and not accepted, and that the testimony [Shahādah] of one who does not possess integrity is rejected, and the report [Khabar] as well- even though its significance is separated from the meaning of testimony in some respects, they are in agreement regarding the overall conditions they share since the report of the sinful is not acceptable according to Ahl ul-Ilm just as his testimony is rejected according to all of them . The Sunnah demonstrates the prohibition of transmitting abominable transmissions just as in the example from the Qur’ān regarding the prohibition of the report of the sinful.There is a famous narration on authority of the Messenger of Allah, peace and blessings of Allah upon him, that: ‘Whoever relates on my authority a narration while aware that it is a lie, then he is one of the liars’ . Abū Bakr ibn Abī Shaybah narrated it to us that Wakī narrated to us, on authority of Shu’bah, on authority of al-Hakam, on authority of Abd ir-Rahman ibn Abī Laylā, on authority of Samurah bin Jundab. And also Abū Bakr ibn Abī Shaybah narrated to us, that Wakī narrated to us, on authority of Shu’bah and Sufyān, on authority of Habīb, on authority of Maymūn ibn Abī Shabīb, on authority of al-Mughīrat ibn Shu’bah, they both said that the Messenger of Allah, peace and blessings of Allah upon him, said the same thing.

Sahih Muslim Hadith 1 in Urdu, Arabic, English