'Upright' in the Bible

May the Lord punish him for the blood he shed; behind my father David's back he struck down and murdered with the sword two men who were more innocent and morally upright than he -- Abner son of Ner, commander of Israel's army, and Amasa son of Jether, commander of Judah's army.

And Solomon said, Great was your mercy to David my father, as his life before you was true and upright and his heart was true to you; and you have kept for him this greatest mercy, a son to take his place this day.

"Now as for you, if you commune with me like your father did, with an upright heart of integrity and doing everything that I've commanded you and keeping my statutes and ordinances,

For they made high places and upright stones and wood pillars on every high hill and under every green tree;