The word(s) "vengeance" appears 2 time(s) in 2 verse(s) in Quran in Saheeh International translation.

(1) So when you meet those who disbelieve [in battle], strike [their] necks until, when you have inflicted slaughter upon them, then secure their bonds, and either [confer] favor afterwards or ransom [them] until the war lays down its burdens. That [is the command]. And if Allah had willed, He could have taken vengeance upon them [Himself], but [He ordered armed struggle] to test some of you by means of others. And those who are killed in the cause of Allah - never will He waste their deeds.

(2) Indeed, the vengeance of your Lord is severe.