John Gills Exposition of the Bible Commentary - Psalms 3:3
But thou, O Lord, art a shield for me ,.... Or "about me" F1 בעדי "circa me", Junius & Tremellius, Piscator, Muis, Ainsworth, Cocceius, Michaelis. protecting and defending me. David was a military man, and often alludes to military affairs; and borrows words from thence, expressive of his great security from the Lord; see Psalm 18:2 . So Jehovah the Father was a shield to Christ, in his infancy, from Herod's rage and fury; and afterwards from the insults of the Pharisees, and... read more
Matthew Henry's Complete Commentary - Psalms 3:1-3
The title of this psalm and many others is as a key hung ready at the door, to open it, and let us into the entertainments of it; when we know upon what occasion a psalm was penned we know the better how to expound it. This was composed, or at least the substance of it was meditated and digested in David's thought, and offered up to God, when he fled from Absalom his son, who formed a conspiracy against him, to take away, not his crown only, but his life; we have the story, 2 Sam. 15:1-16:14... read more