The word(s) "o you who believe" appears 88 time(s) in 88 verse(s) in Quran in Mohsin Khan translation.

(41) o you who believe! Ask not about things which, if made plain to you, may cause you trouble. But if you ask about them while the Qur'an is being revealed, they will be made plain to you. Allah has forgiven that, and Allah is Oft-Forgiving, Most Forbearing.

(42) o you who believe! Take care of your ownselves . If you follow the (right) guidance [and enjoin what is right (Islamic Monotheism and all that Islam orders one to do) and forbid what is wrong (polytheism, disbelief and all that Islam has forbidden)] no hurt can come to you from those who are in error. The return of you all is to Allah, then He will inform you about (all) that which you used to do.

(43) o you who believe! When death approaches any of you, and you make a bequest, (then take) the testimony of two just men of your own folk or two others from outside, while you are travelling through the land and death befalls on you. Detain them both after As-Salat (the prayer), (then) if you are in doubt (about their truthfulness), let them both swear by Allah (saying): "We wish not for any worldly gain in this, even though he (the beneficiary) be our near relative. We shall not hide Testimony of Allah, for then indeed we should be of the sinful."

(44) o you who believe! When you meet those who disbelieve, in a battle-field, never turn your backs to them.

(45) o you who believe! Obey Allah and His Messenger, and turn not away from him (i.e. Messenger Muhammad صلى الله عليه وسلم) while you are hearing.

(46) o you who believe! Answer Allah (by obeying Him) and (His) Messenger when he (صلى الله عليه وسلم) calls you to that which will give you life, and know that Allah comes in between a person and his heart (i.e. He prevents an evil person to decide anything). And verily to Him you shall (all) be gathered.

(47) o you who believe! Betray not Allah and His Messenger, nor betray knowingly your Amanat (things entrusted to you, and all the duties which Allah has ordained for you).

(48) o you who believe! If you obey and fear Allah, He will grant you Furqan [(a criterion to judge between right and wrong), or (Makhraj, i.e. a way for you to get out from every difficulty)], and will expiate for you your sins, and forgive you; and Allah is the Owner of the Great Bounty.

(49) o you who believe! When you meet (an enemy) force, take a firm stand against them and remember the Name of Allah much (both with tongue and mind), so that you may be successful.

(50) o you who believe! Take not as Auliya' (supporters and helpers) your fathers and your brothers if they prefer disbelief to Belief. And whoever of you does so, then he is one of the Zalimun (wrong-doers).