The word(s) "breast" appears 32 time(s) in 29 verse(s) in Quran in Muhammad Habib Shakir translation.

(11) Then, it may be that you will give up part of what is revealed to you and your breast will become straitened by it because they say: Why has not a treasure been sent down upon him or an angel come with him? You are only a warner; and Allah is custodian over all things.

(12) And We will root out whatever of rancor is in their breasts-- (they shall be) as brethren, on raised couches, face to face.

(13) And surely We know that your breast straitens at what they say;

(14) He who disbelieves in Allah after his having believed, not he who is compelled while his heart is at rest on account of faith, but he who opens (his) breast to disbelief-- on these is the wrath of Allah, and they shall have a grievous chastisement.

(15) He said: O my Lord! Expand my breast for me,

(16) Have they not travelled in the land so that they should have hearts with which to understand, or ears with which to hear? For surely it is not the eyes that are blind, but blind are the hearts which are in the breasts.

(17) And by breast straitens, and my tongue is not eloquent, therefore send Thou to Haroun (to help me);

(18) And most surely your Lord knows what their breasts conceal and what they manifest.

(19) And your Lord knows what their breasts conceal and what they manifest.

(20) And among men is he who says: We believe in Allah; but when he is persecuted in (the way of) Allah he thinks the persecution of men to be as the chastisement of Allah; and if there come assistance from your Lord, they would most certainly say: Surely we were with you. What! is not Allah the best knower of what is in the breasts of mankind.