'Truth' in the Bible

That the LORD may continue his word which he spake concerning me, saying, If thy children take heed to their way, to walk before me in truth with all their heart and with all their soul, there shall not fail thee (said he) a man on the throne of Israel.

And Solomon said, Thou hast shewed unto thy servant David my father great mercy, according as he walked before thee in truth, and in righteousness, and in uprightness of heart with thee; and thou hast kept for him this great kindness, that thou hast given him a son to sit on his throne, as it is this day.

And the woman said to Elijah, Now by this I know that thou art a man of God, and that the word of the LORD in thy mouth is truth.

But the king said to him, “How many times must I make you swear not to tell me anything but the truth in the name of Yahweh?”