English translation
4606. It was narrated that 'Aishah said: "The Messenger of Allāh ﷺ said: 'Whoever introduces something into this matter of ours that is not part of it, he will have it rejected.'" (Sahih) Ibn 'Eisā (one of the narrators) said: "The Prophet ﷺ said: 'Whoever does something upon other than our matter, he will have it rejected.'"
