(6) باب فِي لُزُومِ السُّنَّةِ
`A'ishah reported the Messenger of Allah (ﷺ) as saying:
If any one introduces into this affair of ours anything which does not belong to it, it is rejected. Ibn `Isa said: The Prophet (ﷺ) said: If anyone practices any action in a way other than our practice, it is rejected. (RU)
Reference (RU): Sunan Abi Dawud 4606 (RU)
In-book reference (RU): Book 42, Hadith 11 (RU)
English translation (RU): Book 41, Hadith 4589 (RU)