'Truly' in the Bible

For if you truly amend your ways and your deeds, if you truly practice justice between a man and his neighbor,

Woe is me, because of my injury!My wound is incurable.But I said, “Truly this is a sickness,And I must bear it.”

“Although our iniquities testify against us,O Lord, act for Your name’s sake!Truly our apostasies have been many,We have sinned against You.

Only know for certain that if you put me to death, you will bring innocent blood on yourselves, and on this city and on its inhabitants; for truly the Lord has sent me to you to speak all these words in your hearing.”

The prophet who prophesies of peace, when the word of the prophet comes to pass, then that prophet will be known as one whom the Lord has truly sent.”