'Steadfast' in the Bible

and has extended His mercy and lovingkindness to me before the king, his advisers, and all the king’s mighty officials. I was strengthened and encouraged, for the hand of the Lord my God was upon me, and I gathered together outstanding men of Israel to go up with me [to Jerusalem].

For we are slaves; yet our God has not abandoned us in our bondage, but has extended lovingkindness to us before the kings of Persia, to revive us to rebuild the house of our God, to repair the site of its ruins and to give us a wall [of protection] in Judah and Jerusalem.