Psalms 4:3

“But know, etc.] Take notice of it, consider it, be assured of the truth, of it; it may be depended upon as fact, that the Lord hath set apart him that is godly for himself: which may be understood of David himself, an holy good man; a man after God’s own heart; whom the Lord chose, and in a marvellous manner separated from the rest of his brethren; took him from the sheepfold, and set him upon the throne of Israel, for the glory of his great name; and therefore the attempts of his enemies against him would be without success: and also of the Messiah, God’s Holy One, whom he has chosen out from among the people to be their Saviour and Redeemer, to the glory of his grace; wherefore the work of…”

“godly--an object as well as subject of divine favor (compare Psa 105:14-15).”

“But know - This is addressed to those whom, in the previous verse, he had called the “sons of men;” that is, his foes. This is designed to show them that their opposition to him must be vain, since God had determined to set him apart for his own service, and would, therefore, hear his prayer for relief and protection. That the Lord hath set apart - That Yahweh had done this; that is, that he had designated him to accomplish a certain work, or that he regarded him as an instrument to perform it. He would, therefore, protect him whom he had thus appointed; and their efforts were really directed against Yahweh himself, and must be vain. Him that is godly for himself - For his own purposes, or…”

“Godly - Me, whom, though you traduce as an hypocrite, God hath pronounced to he a man after his own heart, Sa1 13:14. For himself - In his stead, or to be his vicegerent, as all kings are, and especially the kings of God's own people. Psalms 4:4”

“that the: Exo 33:16; Eph 2:10; Th2 2:13, Th2 2:14; Ti2 2:19; Pe1 2:9; Pe2 2:9 for: Tit 2:14 the Lord: Psa 34:15, Psa 55:16, Psa 55:17, Psa 56:9, Psa 91:14, Psa 91:15; Joh 15:16 Psalms 4:4”