80:34Abasa

“Before the Hour comes, there will be tribulation like pieces of black night, when a man will wake up as a believer but be a disbeliever by evening, or he will be a believer in the evening but will be a disbeliever by morning. And the one who is sitting will be better than the one who is standing, and the one who is standing will be better than the one who is walking, and the one who is walking will be better than the one who is running. So break your bows, cut their strings and strike your swords against rocks, and if anyone enters upon anyone of you, let him be like the better of the two sons of Adam. (i.e. the one killed, not the killer).”

When a man calls his brother an unbeliever, it returns (at least) to one of them.

" Morning will come upon a man as a believer, who will be a disbeliever in the evening, and evening will come upon a believer, who will be a disbeliever in the morning" - he said: "Morning would come while his brother's blood, honor and wealth was sacred, and when evening would come, he would consider it lawful for him. And evening would come while his brother's blood, honor and wealth was sacred, and when morning would come, he would consider it lawful for him."

that the Messenger of Allah (ﷺ) said: "The people will flee from the Dajjal such that they will go to the mountains." Umm Sharik said: "O Messenger of Allah! Where will the Arabs be that day?" He said: "They will be few."

"A man is not to undersell his brother, nor is he to fry to outhaggle his brother."