“When ‘Ali bin Abu Talib came to Basrah, he entered upon my father and said: ‘O Abu Muslim, will you not help me against these people?’ He said: ‘Of course.’ So he called a slave woman of his and said: ‘O slave woman, bring me my sword.’ So she brought it, and he unsheathed it a span, and (I saw that) it was made of wood. He said: ‘My close friend and your cousin (ﷺ) advised me, if tribulation (Fitnah) arose among the Muslims, that I should take a sword of wood. If you wish I will go out with you.’ He said: ‘I have no need of you or of your sword.’”
Sunan Ibn Majah Book 36, Hadith 35
← Previous Hadith “Before the Hour comes there will be Harj.” I said: “O Messenger of Allah, what is Harj?” He said: “Killing.” Some of the Muslims said: “O Messenger of Allah, now we kill such and such a number of idolaters in one year.” The Messenger of Allah (ﷺ) said: “That will not be like killing the idolaters, rather you will kill one another, until a man will kill his neighbor and son of the cousin and a relative.” Some of the people said: “O Messenger of Allah, will we be in our right minds that day?” The Messenger of Allah (ﷺ) said: “No, reason will be taken away from most of the people at that time, and there will be left the insignificant people who have no reason.”

Sunan Ibn Majah Book 36, Hadith 34 Next Hadith → “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).”

Sunan Ibn Majah Book 36, Hadith 36