The word(s) "convinced" appears 2 time(s) in 2 verse(s) in Quran in Mohsin Khan translation.

(1) [Musa (Moses)] said: "The Lord of the heavens and the earth, and all that is between them, if you seek to be convinced with certainty."

(2) And they belied them (those Ayat) wrongfully and arrogantly, though their ownselves were convinced thereof [i.e. those (Ayat ) are from Allah, and Musa (Moses) is the Messenger of Allah in truth, but they disliked to obey Musa (Moses), and hated to believe in his Message of Monotheism]. So see what was the end of the Mufsidun (disbelievers, disobedient to Allah, evil-doers and liars.).