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

(61) o you who believe! When you marry believing women, and then divorce them before you have sexual intercourse with them, no 'Iddah [divorce prescribed period, see (V.65:4)] have you to count in respect of them. So give them a present, and set them free (i.e. divorce), in a handsome manner.

(62) o you who believe! Enter not the Prophet's houses, unless permission is given to you for a meal, (and then) not (so early as) to wait for its preparation. But when you are invited, enter, and when you have taken your meal, disperse without sitting for a talk. Verily, such (behaviour) annoys the Prophet, and he is shy of (asking) you (to go); but Allah is not shy of (telling you) the truth. And when you ask (his wives) for anything you want, ask them from behind a screen: that is purer for your hearts and for their hearts. And it is not (right) for you that you should annoy Allah's Messenger, nor that you should ever marry his wives after him (his death). Verily, with Allah that shall be an enormity.

(63) Allah sends His Salat (Graces, Honours, Blessings, Mercy) on the Prophet (Muhammad صلى الله عليه وسلم), and also His angels (ask Allah to bless and forgive him). o you who believe! Send your Salat on (ask Allah to bless) him (Muhammad صلى الله عليه وسلم), and (you should) greet (salute) him with the Islamic way of greeting (salutation i.e. As-Salamu 'Alaikum ).

(64) o you who believe! Be not like those who annoyed Musa (Moses), but Allah cleared him of that which they alleged, and he was honourable before Allah.

(65) o you who believe! Keep your duty to Allah and fear Him, and speak (always) the truth.

(66) o you who believe! If you help (in the cause of) Allah, He will help you, and make your foothold firm.

(67) o you who believe! Obey Allah, and obey the Messenger (Muhammad صلى الله عليه وسلم) and render not vain your deeds.

(68) o you who believe! Make not (a decision) in advance before Allah and His Messenger (صلى الله عليه وسلم), and fear Allah. Verily! Allah is All-Hearing, All-Knowing.

(69) o you who believe! Raise not your voices above the voice of the Prophet (صلى الله عليه وسلم), nor speak aloud to him in talk as you speak aloud to one another, lest your deeds should be rendered fruitless while you perceive not.

(70) o you who believe! If a Fasiq (liar - evil person) comes to you with any news, verify it, lest you should harm people in ignorance, and afterwards you become regretful for what you have done.