'Righteous' in the Bible

How much more, when wicked men have slain a righteous person in his own house upon his bed? shall I not therefore now require his blood of your hand, and take you away from the earth?

And Absalom saith, 'Who doth make me a judge in the land, that unto me doth come every man who hath a plea and judgment? -- then I have declared him righteous.'

He said -- the God of Israel -- to me, He spake -- the Rock of Israel: He who is ruling over man is righteous, He is ruling in the fear of God.