Answer: The Mother of the Believers, Umm ‘Abdullah ‘Ā’ishah (may Allah be pleased with her) reported that the Prophet (may Allah's peace and blessings be upon him) said: "Whoever introduces in this matter of ours (the religion) something that does not belong to it, it will be rejected." [Narrated by Al-Bukhāri and Muslim]
Benefits of the Hadīth
1. Prohibition of introducing new things in religion
2. Actions based upon religious innovations are rejected
Third Hadīth