"In the end of time there shall come men who will swindle the world with religion, decieving the people in soft skins of sheep, their tongues are sweeter than sugar and their hearts are the hearts of wolves. Allah says: 'Is it me you try to delude or is it against me whom you conspire? By Me, I swear to send upon these people,among them, a Fitnah that leaves them utterly devoid of reason."
Jami` at-Tirmidhi Book 36, Hadith 102
← Previous Hadith "There is no one who dies but he shall regret." They said: "What shall he regret over O Messenger of Allah?" He said: "If he was a good doer, he regrets that he did not do more, and if he was an evil doer, he regrets that he did not stop."

Jami` at-Tirmidhi Book 36, Hadith 101 Next Hadith → "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?'"

Jami` at-Tirmidhi Book 36, Hadith 103