{It is only Satan that suggests to you the fear of his allies. So, do not fear them, and fear Me if you are believers.}khalid ibn walid R.A was cousin of umar ibn khattab R.A he excepted islam after battle of trench which he fought agains muslims and he was famous and popular commandar of all time won over hundreds of battles he was given title sword of allah. he had greatest regret in his life that he died on bed not as a martyr.Khalid put all the torment of his soul into one last, anguished sentence:I fought in so many battles seeking martyrdom that there is no place in my body but have a stabbing mark by a spear , a sword or a dagger, and yet here I am, dying on my bed like an old camel dies. May the eyes of the cowards never sleepAbu Dharr said, "I was with the prophet s.a.w. one day and I heard him saying: There is something more I fear for my Ummah than the Dajjal." It was then that I became afraid, so I said: "Oh Rasulullah Which thing is that?" He s.a.w. said: "Misguided and Astray scholars."(Musnad Ahmad hadeeth # 20335)Abdullaah Ibn Abbaas said that Allahs Messenger said, There shall be rulers whom you will recognize from them good and evil.Whoever opposes them is saved. Whoever abandons them is freed. And whoever intermingles with them is destroyed. (Collected by Ibn Abee Shaybah and at-TabaraaneeThe `Ulama have said, One who is an imaam for an oppressive ruler, prayer is not to be made behind him unless he reveals his excuse or reason why (he is an imaam for the oppressive ruler) or he repents from it (being an imaam for an oppressive ruler). - Imaam Qurtubi in his Jaami ul Ahkaam ul Fiqiyyah volume 2The Messenger of Allah (Sallallahu Alaihi Wasallam) said "If you see my Ummah afraid of telling the oppressor: You are an oppressor, it is farewell to the ummah" - Abi al-'Awar as-Silmi (radhi Allahu anhu) reported that the Messenger of Allah (sallallahu alayhe wa salam) said: "Beware of the doors of the ruler for they...