'Firm' in the Bible

Resist him and be firm in the faith, knowing that the same sufferings are being experienced by your fellow believers throughout the world.

And God, the giver of all grace, who has called you to share His eternal glory, through Christ, after you have suffered for a short time, will Himself make you perfect, firm, and strong.

Through Silvanus, whom I regard as a faithful brother, I have written this short letter to encourage you and to testify that this is to be the true grace of God in which you are to stand firm!