Psalms 91:4

Verse Psalms 91:4. He shall cover thee with his feathers] He shall act towards thee as the hen does to her brood, - take thee under his wings when birds of prey appear, and also shelter thee from chilling blasts. This is a frequent metaphor in the sacred writings; see the parallel texts in the margin (Psalms 17:8, Psalms 57:1, Psalms 61:4), and the notes on them. The Septuagint has Εν τοις μεταφρενοις αυτου επισκιασει σοι· He will overshadow thee between his shoulders; alluding to the custom of parents carrying their weak or sick children on their backs, and having them covered even there with a mantle. Thus the Lord is represented carrying the Israelites in the wilderness. See Deuteronomy 32:11-5, where the metaphor is taken from the eagle.

His truth shall be thy shield and buckler] His revelation; his Bible. That truth contains promises for all times and circumstances; and these will be invariably fulfilled to him that trusts in the Lord. The fulfillment of a promise relative to defence and support is to the soul what the best shield is to the body.