The word(s) "proved" appears 4 time(s) in 4 verse(s) in Quran in Mohsin Khan translation.

(1) They [Yusuf's (Joseph) men] said: "What then shall be the penalty of him, if you are (proved to be) liars."

(2) Set not up with Allah any other ilah (god), (O man)! (This verse is addressed to Prophet Muhammad صلى الله عليه و سلم , but its implication is general to all mankind), or you will sit down reproved, forsaken (in the Hell-fire).

(3) Among the believers are men who have been true to their covenant with Allah [i.e. they have gone out for Jihad (holy fighting), and showed not their backs to the disbelievers]; of them some have fulfilled their obligations (i.e. have been martyred); and some of them are still waiting, but they have never changed [i.e. they never proved treacherous to their covenant which they concluded with Allah] in the least.

(4) Indeed the Word (of punishment) has proved true against most of them, so they will not believe.