بسم الله الرحمن الرحيم

The Imaam Rabee bin Haadi Al Madkhalee – May Allah preserve him – reported that many of the Salaf said:

“Verily the people of innovation are more harmful to islaam than the external enemies, why? Because they destroy from the inside, and afterwards they open the door to the enemies and say “Enter!”

المجموع الرائق – ص39