The word(s) "confirmed" appears 4 time(s) in 4 verse(s) in Quran in Saheeh International translation.

(1) And Iblees had already confirmed through them his assumption, so they followed him, except for a party of believers.

(2) Rather, the Prophet has come with the truth and confirmed the [previous] messengers.

(3) Unquestionably, for Allah is the pure religion. And those who take protectors besides Him [say], "We only worship them that they may bring us nearer to Allah in position." Indeed, Allah will judge between them concerning that over which they differ. Indeed, Allah does not guide he who is a liar and [confirmed] disbeliever.

(4) Indeed, if You leave them, they will mislead Your servants and not beget except [every] wicked one and [confirmed] disbeliever.