Tafsir of Al Imran 3:139

وﻻ تهنوا

So do not become weak, because of what you suffered.

وﻻ تحزنوا وأنتم اﻻعلون إن كنتم مومنين

nor be sad, and you will be triumphant if you are indeed believers. for surely, the ultimate victory and triumph will be yours, O believers