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

(121) And He has subjected to you the night and the day, and the sun and the moon; and the stars are subjected by His Command. Surely, in this are proofs for people who understand.

(122) And Allah sends down water (rain) from the sky, then He revives the earth therewith after its death. Verily, in this is a sign (clear proof) for people who listen (obey Allah).

(123) Do they not see the birds held (flying) in the midst of the sky? None holds them but Allah [none gave them the ability to fly but Allah]. Verily, in this are clear Ayat (proofs and signs) for people who believe (in the Oneness of Allah).

(124) Verily! Those who believe not in the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) of Allah, Allah will not guide them and theirs will be a painful torment.

(125) It is only those who believe not in the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) of Allah, who fabricate falsehood, and it is they who are liars.

(126) Glorified (and Exalted) be He (Allah) [above all that (evil) they associate with Him] Who took His slave (Muhammad صلى الله عليه و سلم) for a journey by night from Al-Masjid-al-Haram (at Makkah) to Al-Masjid-al-Aqsa (in Jerusalem), the neighbourhood whereof We have blessed, in order that We might show him (Muhammad صلى الله عليه و سلم) of Our Ayat (proofs, evidence, lessons, signs, etc.). Verily, He is the All-Hearer, the All-Seer .

(127) And nothing stops Us from sending the Ayat (proofs, evidence, signs) but that the people of old denied them. And We sent the she-camel to Thamud as a clear sign, but they did her wrong. And We sent not the signs except to warn, and to make them afraid (of destruction).

(128) And say (O Muhammad صلى الله عليه و سلم): My Lord! Let my entry (to the city of Al-Madinah) be good, and (likewise) my exit (from the city of Makkah) be good. And grant me from You an authority to help me (or a firm sign or a proof).

(129) That is their recompense, because they denied Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and said: "When we are bones and fragments, shall we really be raised up as a new creation?"

(130) [Musa (Moses)] said: "Verily, you know that these signs have been sent down by none but the Lord of the heavens and the earth (as clear evidence i.e. proofs of Allah's Oneness and His Omnipotence.). And I think you are, indeed, O Fir'aun (Pharaoh) doomed to destruction (away from all good)!"