They shall rejoice. In making mention here of joy, jubilee, and the high praises of God, he shows still more clearly from the effects which it would produce, that he does not speak of a common benefit of God; for had not the deliverance of the people been of a remarkable kind, there would have been no occasion for such joy, and even triumph. And by these expressions he intimates that the people would not be brought back from exile to be immediately dispersed again, but to flourish in the enjoyment of every species of blessing. He on this account makes mention of couches, teaching them to expect daily rest under the divine protection. He declares that they would be furnished with arms and power, not only to ward off enemies, but to put them to flight on every side, so as to reduce to subjection kings and nations which formerly ruled over them. By swords of a double-mouth, or two-edged, are meant such as cut on both sides, for at that time swords had but one edge.

Let the saints be joyful in glory - In the glory of their condition; in the favor of God; in the honor which he bestows upon them. Let them rejoice in this; let them shout and triumph over this. Other men rejoice in honor; in wealth; in houses, lands, parks, libraries, works of art: let the saints rejoice in the glory of being the friends of God; in the hope of heaven. Compare Psalm 84:11.
Let them sing aloud upon their beds - Compare Job 35:10, note; Acts 16:25, note; Psalm 34:1, note. The idea is, that in the meditations of the night, when darkness is around them, when alone with God, they may find occasion for exultation and praise. Their hearts may be full of joy, and alone they may give expression to their joy in songs of praise.

Let the saints be joyful in glory - Let them be gloriously joyful: seeing themselves so honored and so successful, let them be joyful. God has put glory or honor upon them; let them give him the thanks due to his name.
Sing aloud upon their beds - While they are reclining on their couches. At their festal banquets, let them shout the praises of the Lord. In imitation of this we often have at our public entertainments the following words sung, taken from the Vulgate of Psalm 115:1 : Non Nobis Domine Non Nobis; sed Nomini Tuo da Gloriam! super Misericordia Tua et Veritate Tua. "Not unto us, O Lord, not unto us, but unto thy name give glory, for thy mercy and for thy truth's sake." Let them mingle their feasting with Divine songs. This reclining on couches, while they take their food, is still practiced in Asiatic countries.

Let the saints be joyful in glory: let them sing aloud upon their (d) beds.
(d) He alludes to that continual rest and quietness which they should have if they would suffer God to rule them.

Let the saints be joyful in glory,.... In the glory put upon them now, being beautified with salvation; in the righteousness of Christ on them, and the grace of Christ in them, which makes them all glorious within; and in the glory they expect to have hereafter, both upon their bodies and souls, and in the hope of that, Romans 5:2. Some copies of the Ethiopic version render it, "in his glory"; in the glory of Christ, asa divine Person and as Mediator, seen now in the glass of the Gospel, and will be the object of the beautiful vision hereafter; and now is, and then will be, matter of joy unspeakable, 2-Corinthians 3:18. Or "gloriously" (l), in a glorious manner; as saints do rejoice, when they ascribe all the glory of salvation to the free grace of God and death of Christ, and rejoice on that account; saints have reason to rejoice, and indeed none but they; who being regenerated and sanctified, are meet for and shall partake of eternal glory;
let them sing aloud upon their beds; while others are taking their rest and ease, let them meditate on the word of God; commune with their own hearts about their state and condition; remember the Lord, and his goodness to them; all which give an occasion to give thanks unto him, and sing aloud his praise, Psalm 63:5; and when they awake on their beds in a morning, after sound sleep and a good repose, it becomes them to praise the Lord, who gives his beloved sleep; and who only makes them sleep, and dwell in safety, Psalm 4:8. And the phrase denotes the safe and secure state of the saints upon their beds, lying down and sleeping comfortably, having nothing to fear, the Lord sustaining them; and so may and should sing upon their beds, Psalm 3:5; Yea, saints may sing upon their sick beds; since the Lord is with them there, and strengthens them on a bed of languishing, and makes all their bed in their sickness, Psalm 41:3; and even upon their death beds may sing aloud the triumphant song, "O death, where is thy sting?" &c. 1-Corinthians 15:55. Saints in a future state are on beds; the grave is a bed, where their flesh rests in hope; and the bosom and arms of Jesus are the bed in which their souls rest; and where they are, not in a state of insensibility and inactivity, but are walking and talking, and singing aloud the praises of electing, redeeming, and calling grace, Isaiah 57:1. So Arama interprets the saints on their beds, those that lie in the grave, when they shall rise from thence,
(l) "gloriose", Castalio.

in glory--the honorable condition to which they are raised.
upon their beds--once a place of mourning (Psalm 6:6).

In glory - For the honour which God putteth upon them. Beds - By night as well as by day.