'Steadfast' in the Bible
For thus says the Lord: Enter not into the house of mourning, nor go to lament or bemoan [the dead], for I have taken away My peace from this people, says the Lord, even My steadfast love and loving-kindness and tender mercy.
Blessed is the man that is steadfast in the LORD and whose trust is the LORD.
[There shall be heard again] the voice of joy and the voice of gladness, the voice of the bridegroom and the voice of the bride, the voices of those who sing as they bring sacrifices of thanksgiving into the house of the Lord, Give praise and thanks to the Lord of hosts, for the Lord is good; for His mercy and kindness and steadfast love endure forever! For I will cause the captivity of the land to be reversed and return to be as it was at first, says the Lord.
Then will I also cast away the descendants of Jacob and David My servant and will not choose one of his offspring to be ruler over the descendants of Abraham, Isaac, and Jacob. For I will cause their captivity to be reversed, and I will have mercy, kindness, and steadfast love on and for them.