Albert Barnes Commentary Psalms 111:3

"His work is honor and majesty; And his righteousness endureth for ever." — Psalms 111:3 (ASV)

His work is honorable and glorious — literally, “Honor and glory is his work;” that is, All that he does is honorable and glorious. The language would cover all that God does in the works of creation, providence, and redemption. There is honor—there is majesty—in everything that he does.

And his righteousness endures forever — That is, It will be found in all the investigations of his works, that he is unchangeably righteous or just. All that he has done, or that he now does, goes to demonstrate this. There are actions of people—even of good people—which will not bear investigation; but there are no such acts of God. There are things that people do which excite admiration only when there is no investigation concerning them; but the works of God are admired the more, the more they are studied. There are things which appear beautiful or sweet only when they are not shaken; a collection of perfumes will give out sweet scents the more it is stirred.