Refutation of innovation in Islam:

Refutation of innovation in Islam: for those who can't restrict themselves to the sunnah followed by the khulafa-e-rashidoon

Muhammad Ibn Abdur Rahmaan al-Adramee said to a man who was speaking about an innovation, and calling the people to it:
-Did the Messenger of Allaah (Sallallaahu 'Alayhi Wa Sallam), Abu Bakr, 'Umar, 'Uthmaan, and 'Alee have knowledge of it, or did they not know of it?
The man said: They did not know of it.
He said: Something which they did not have knowledge of, you know!?!
The man said: Then I say that they did know it.
He said:
-Was it sufficient for them that they did speak about it, nor call the people to it, or was it not sufficient for them?
The man said: Of course it was sufficient for them.
He said:
-So something which was sufficient for the Messenger of Allaah (Sallallaahu 'Alayhi Wa Sallam) and his Caliphs is not sufficient for you!?!

So the man refrained, and the Caliph who was present there said:
May Allaah not suffice for the ones who are not satisfied with what they found sufficient.

[Reported by al Khateeb in Taareekhul Baghdaad (10/75).
Ibnul Jawzee in Manaaqibul Imaam Ahmad (p. 431, 436).
Ibn Qudaamah in At Tawaabeen (p. 194).
Imaam adh Dhahabee in Siyar A'alaamun Nubalaa (11/131).
Imaam Al Aajurree in Ash Sharee'ah (p. 91,95).
Ibn Katheer in Al Bidaayah Wan Nihaayah (10/335).]