Bible Verses About Warfare of Saints: Exhorted to diligence

Fight the good fight of faith. Lay hold of the eternal life to which you were called, and you confessed the good confession in the sight of many witnesses.

Beloved, while I was very eager to write to you about our common salvation, I was constrained to write to you exhorting you to contend earnestly for the faith which was once for all delivered to the holy ones.