'Truly' in the Bible

All the sons of Israel, seeing the fire come down and the glory of the Lord upon the house, bowed down on the pavement with their faces to the ground, and they worshiped and gave praise to the Lord, saying, “Truly He is good, truly His lovingkindness is everlasting.”

Because your heart was tender and you humbled yourself before God when you heard His words against this place and against its inhabitants, and because you humbled yourself before Me, tore your clothes and wept before Me, I truly have heard you,” declares the Lord.