'Steadfast' in the Bible

But he who stands steadfast in his heart, having no necessity, but has power over his own heart, to keep his own virgin, does well.

Therefore, my beloved brothers, be steadfast, immovable, always abounding in the Lord's work, because you know that your labor is not in vain in the Lord.

Our hope for you is steadfast, knowing that, since you are partakers of the sufferings, so also are you of the comfort.

if it is so that you continue in the faith, grounded and steadfast, and not moved away from the hope of the Good News which you heard, which is being proclaimed in all creation under heaven; of which I, Paul, was made a servant.

For if the word spoken through angels proved steadfast, and every transgression and disobedience received a just recompense;

This hope we have as an anchor of the soul, a hope both sure and steadfast and entering into that which is within the veil;

Withstand him steadfast in your faith, knowing that your brothers who are in the world are undergoing the same sufferings.