'Blamelessly' in the Bible

He who walks with integrity and strength of character, and works righteousness,And speaks and holds truth in his heart.

My eyes will be on the faithful (honorable) of the land, that they may dwell with me;He who walks blamelessly is the one who will minister to and serve me.

They both were righteous (approved) in the sight of God, walking blamelessly in all the commandments and requirements of the Lord.