Muhammad bin Abd Allah bin Quhzādh from the people of Marw narrated to us, he said I heard Abdān bin Uthmān saying, I heard Abd Allah bin al-Mubārak saying: ‘The chain of narration is from the Dīn, and were it not for the chain of narration whoever wished could say what he wanted’. Muhammad bin Abd Allah said, al-Abbās bin Abī Rizmah narrated to me, he said I heard Abd Allah saying: ‘Between us and the people are ‘the legs’ (meaning the chain of narration, i.e. if a Ḥadīth was like a creature)’. Muhammad said, I heard Abā Ishāq Ibrāhīm bin Īsā at-Tālqānī say, I said to Abd Allah bin al-Mubārak: ‘Oh Abā Abd ir-Rahman! How is the Ḥadīth which goes ‘Indeed from al-Birr after al-Birr is that you pray for your parents after you pray for yourself and you fast for them both after you fast for yourself’? So ’. Muhammad said, I heard Alī bin Shaqīq saying, I heard Abd Allah bin al-Mubārak saying in front of the people: ‘Abandon the Ḥadīth of Amr bin Thābit for indeed he would curse the Salaf ’.
Sahih Muslim · Introduction