'Tranquillity' in the Bible

For he will not often consider the [troubled] days of his life, because God keeps him occupied and focused on the joy of his heart [and the tranquility of God indwells him].

I said, “In mid-lifeI am to go through the gates of Sheol (the place of the dead),I am to be summoned, deprived of the remainder of my years.”

Wherefore, O king, let my counsel be acceptable unto thee, and break off thy sins by righteousness, and thine iniquities by shewing mercy to the poor; if it may be a lengthening of thy tranquillity.