John Gills Exposition of the Bible Commentary - Psalms 4:3
But know ,.... 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... read more
Matthew Henry's Complete Commentary - Psalms 4:1-5
The title of the psalm acquaints us that David, having penned it by divine inspiration for the use of the church, delivered it to the chief musician, or master of the song, who (according to the divine appointment of psalmody made in his time, which he was chiefly instrumental in the establishment of) presided in that service. We have a particular account of the constitution, the modelling of the several classes of singers, each with a chief, and the share each bore in the work, 1 Chron.... read more