The word(s) "proof" appears 241 time(s) in 235 verse(s) in Quran in Mohsin Khan translation.

(71) "Proper it is for me that I say nothing concerning Allah but the truth. Indeed I have come unto you from your Lord with a clear proof. So let the Children of Israel depart along with me."

(72) "And you take vengeance on us only because we believed in the Ayat (proofs, evidence, lessons, signs, etc.) of our Lord when they reached us! Our Lord! pour out on us patience, and cause us to die as Muslims."

(73) They said [to Musa (Moses)]: "Whatever Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) you may bring to us, to work therewith your sorcery on us, we shall never believe in you."

(74) So We took retribution from them. We drowned them in the sea, because they belied Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and were heedless about them.

(75) I shall turn away from My Ayat (verses of the Qur'an) those who behave arrogantly on the earth, without a right, and (even) if they see all the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), they will not believe in them. And if they see the way of righteousness (monotheism, piety, and good deeds), they will not adopt it as the Way, but if they see the way of error (polytheism, crimes and evil deeds), they will adopt that way, that is because they have rejected Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and were heedless (to learn a lesson) from them.

(76) Those who deny Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and the Meeting in the Hereafter (Day of Resurrection,), vain are their deeds. Are they requited with anything except what they used to do?

(77) "And ordain for us good in this world, and in the Hereafter. Certainly we have turned unto You." He said: (As to) My punishment I afflict therewith whom I will and My Mercy embraces all things. That (Mercy) I shall ordain for those who are the Muttaqun (the pious - See V.2:2), and give Zakat; and those who believe in Our Ayat (proofs, evidence, verses, lessons, signs and revelations, etc.);

(78) Thus do We explain the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) in detail, so that they may turn (unto the truth).

(79) And recite (O Muhammad صلى الله عليه وسلم) to them the story of him to whom We gave Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), but he threw them away; so Shaitan (Satan) followed him up, and he became of those who went astray.

(80) And had We willed, We would surely have elevated him therewith but he clung to the earth and followed his own vain desire. So his parable is the parable of a dog: if you drive him away, he lolls his tongue out, or if you leave him alone, he (still) lolls his tongue out. Such is the parable of the people who reject Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.). So relate the stories, perhaps they may reflect.