Bible Verses About Warfare of Saints: Exhorted to diligence

Fight the good fight of the faith, lay hold on the life eternal, whereunto thou wast called, and didst confess the good confession in the sight of many witnesses.

Beloved, while I was giving all diligence to write unto you of our common salvation, I was constrained to write unto you exhorting you to contend earnestly for the faith which was once for all delivered unto the saints.