20-22. do his commandments . . . word—or, literally, "so as to hearken," &c., that is, their acts of obedience are prompt, so that they are ever ready to hear, and know, and follow implicitly His declared will (compare De 26:17; Lu 1:19).

     21. ye his hosts—myriads, or armies, as corresponding to angels of great power [Ps 103:20], denoting multitudes also.