The hope of the Righteous One when everywhere spoken against Doeg, the Edomite, sought the hurt and destroyal of David by reporting maliciously to Saul of David’s whereabouts.
There is a contrast here of the wicked man who trusts in self, his connections, and his riches – with the righteous one whose trust is in the mercy of God.
The emphasis upon the tongue that devises mischief and deceit, reminds of James’ treatment of it in his epistle. To tell lies, to carry tales, to ruin other people’s characters by false reports, show how powerful the little member is. David, in the face of these defamatory attacks, would use his tongue to praise the Lord (v. 9). This is its true vocation; it is sin that has altered its use. As Christians, our conversation should be seasoned with all grace, rather than laced with arsenic.