The word(s) "breast" appears 44 time(s) in 41 verse(s) in Quran in Mohsin Khan translation.

(1) Say (O Muhammad صلى الله عليه وسلم): "Whether you hide what is in your breasts or reveal it, Allah knows it, and He knows what is in the heavens and what is in the earth. And Allah is Able to do all things."

(2) O you who believe! Take not as (your) Bitanah (advisors, consultants, protectors, helpers, friends) those outside your religion (pagans, Jews, Christians, and hypocrites) since they will not fail to do their best to corrupt you. They desire to harm you severely. Hatred has already appeared from their mouths, but what their breasts conceal is far worse. Indeed We have made plain to you the Ayat (proofs, evidence, verses) if you understand.

(3) Lo! You are the ones who love them but they love you not, and you believe in all the Scriptures [i.e. you believe in the Taurat (Torah) and the Injeel (Gospel), while they disbelieve in your Book, the Qur'an]. And when they meet you, they say, "We believe." But when they are alone, they bite the tips of their fingers at you in rage. Say: "Perish in your rage. Certainly, Allah knows what is in the breasts (all the secrets)."

(4) Then after the distress, He sent down security for you. Slumber overtook a party of you, while another party was thinking about themselves (as how to save their ownselves, ignoring the others and the Prophet صلى الله عليه وسلم) and thought wrongly of Allah - the thought of ignorance. They said, "Have we any part in the affair?" Say (O Muhammad صلى الله عليه وسلم): "Indeed the affair belongs wholly to Allah." They hide within themselves what they dare not reveal to you, saying: "If we had anything to do with the affair, none of us would have been killed here." Say: "Even if you had remained in your homes, those for whom death was decreed would certainly have gone forth to the place of their death," but that Allah might test what is in your breasts; and to purify that which was in your hearts (sins), and Allah is All-Knower of what is in (your) breasts.

(5) Except those who join a group, between you and whom there is a treaty (of peace), or those who approach you with their breasts restraining from fighting you as well as fighting their own people. Had Allah willed, indeed He would have given them power over you, and they would have fought you. So if they withdraw from you, and fight not against you, and offer you peace, then Allah has opened no way for you against them.

(6) And remember Allah's Favour to you and His Covenant with which He bound you when you said: "We hear and we obey." And fear Allah. Verily, Allah is All-Knower of that which is in (the secrets of your) breasts.

(7) And whomsoever Allah wills to guide, He opens his breast to Islam; and whomsoever He wills to send astray, He makes his breast closed and constricted, as if he is climbing up to the sky. Thus Allah puts the wrath on those who believe not.

(8) (This is the) Book (the Qur'an) sent down unto you (O Muhammad صلى الله عليه وسلم), so let not your breast be narrow therefrom, that you warn thereby; and a reminder unto the believers.

(9) And We shall remove from their breasts any (mutual) hatred or sense of injury (which they had, if at all, in the life of this world); rivers flowing under them, and they will say: "All the praises and thanks be to Allah, Who has guided us to this, and never could we have found guidance, were it not that Allah had guided us! Indeed, the Messengers of our Lord did come with the truth." And it will be cried out to them: "This is the Paradise which you have inherited for what you used to do."

(10) (And remember) when Allah showed them to you as few in your (i.e. Muhammad's صلى الله عليه وسلم) dream; if He had shown them to you as many, you would surely have been discouraged, and you would surely have disputed in making a decision. But Allah saved (you). Certainly, He is the All-Knower of what is in the breasts.