Revelation 16:5

“And I heard the angel of the waters say, etc.] So we read in Jewish writings f380 of an angel that was amyd arç, “the prince of the sea”, and of angels that were over the waters, and others over fire f381; though here is designed not one of the µym ykalm “angels of the water”, that presided ove the waters, as another over fire; (see Gill on “<661418>Revelation 14:18”), but the third angel that poured out his vial upon the waters; when he had so done, he said as follows. Dr. Lightfoot thinks, and that not without reason, that since these angels appeared in the garb of priests, (<661506>Revelation 15:6) and since there was a priest appointed to take care of the wells, and fountains, and…”

“angel of the waters--that is, presiding over the waters. O Lord--omitted by A, B, C, Vulgate, Syriac, Coptic, and ANDREAS. and shalt be--A, B, C, Vulgate, and ANDREAS for this clause read, "(which art and wast) holy." The Lord is now no longer He that shall come, for He is come in vengeance and therefore the third of the three clauses found in Rev 1:4, Rev 1:8; Rev 4:8 is here and in Rev 11:17 omitted. judged thus--literally, "these things." "Thou didst inflict this judgment."”

“And I heard the angel of the waters say - The angel who presides over the element of water; in allusion to the common opinion among the Hebrews that the angels presided over elements, and that each element was committed to the jurisdiction of a particular angel. Compare the notes on Revelation 7:1. Thou art righteous, O Lord - In view of the judgments that reddened these streams and fountains with the blood of people, the angel ascribes righteousness to God. These judgments seemed terrible - the numbers slain were so vast - the bloody stream indicated so great slaughter, and such severity of the divine judgment; yet the angel sees in all this only the act of a righteous God bringing just…”

“The Gracious one - So he is styled when his judgments are abroad, and that with a peculiar propriety. In the beginning of the book he is termed "The Almighty." In the time of his patience, he is praised for his power, which otherwise might then be less regarded. In the time of his taking vengeance, for his mercy. Of his power there could then be no doubt. Revelation 16:6”

“16:5-6 the angel who had authority over all water: Angels and archangels are portrayed as having special roles in the hierarchy of heaven (see Dan 8:16; 9:21; 10:13, 21; 12:1; Luke 1:19, 26; see also 1 Enoch 66:1-2). This angel confirms these judgments as coming from God, who is both just and holy.”

“the angel: Rev 16:4 Thou art: Rev 16:7, Rev 15:3, Rev 19:2; Gen 18:25; Psa 129:4, Psa 145:17; Lam 1:18; Dan 9:14; Rom 2:5; Rom 3:5; Th2 1:5, Th2 1:6 which art: Rev 1:4, Rev 1:8, Rev 4:8, Rev 11:17 Revelation 16:6”