Acts.11.23  When he came and saw the grace of God, he was glad; and he exhorted them all to remain faithful to the Lord with steadfast purpose;
1Cor.15.58  Therefore, my beloved brethren, be steadfast, immovable, always abounding in the work of the Lord, knowing that in the Lord your labor is not in vain.
Col.1.23  provided that you continue in the faith, stable and steadfast, not shifting from the hope of the gospel which you heard, which has been preached to every creature under heaven, and of which I, Paul, became a minister.
Heb.6.19  We have this as a sure and steadfast anchor of the soul, a hope that enters into the inner shrine behind the curtain,
Jas.13.11  Behold, we call those happy who were steadfast. You have heard of the steadfastness of Job, and you have seen the purpose of the Lord, how the Lord is compassionate and merciful.