Ibn 'Umar narrated that the Prophet(s.a.w) said:"Indeed Allah, Most High, said:'I have created creatures whose tongues are sweeter than honey and their hearts are more bitter than aloes. So by Me, I swear to abase them with a Fitnah, leaving them utterly devoid of reason. Is it Me whom they try to delude, or it is against Me whom they conspire?

English translation · Jami' at-Tirmidhi