Psalm 99:1 New English Translation

99 The Lord reigns!
The nations tremble.^[b]
He sits enthroned above the cherubim;^[c]
the earth shakes.^[d]

Psalm 99:1 sn Psalm 99. The psalmist celebrates the Lord’s just rule and recalls how he revealed himself to Israel’s leaders.
Psalm 99:1 tn The prefixed verbal forms in v. 1 are understood here as indicating the nations’ characteristic response to the reality of the Lord’s kingship. Another option is to take them as jussives: “let the nations tremble…let the earth shake!”
Psalm 99:1 sn Cherubim are winged angels. As depicted in the OT, they possess both human and animal (lion, ox, and eagle) characteristics (see Ezek 1:10; 10:14, 21; 41:18). They are pictured as winged creatures (Exod 25:20; 37:9; 1 Kgs 6:24-27; Ezek 10:8, 19) and serve as the very throne of God when the ark of the covenant is in view (Ps 99:1; see Num 7:89; 1 Sam 4:4; 2 Sam 6:2; 2 Kgs 19:15). The picture of the Lord seated on the cherubim suggests they might be used by him as a vehicle, a function they carry out in Ezek 1:22-28 (the “living creatures” mentioned here are identified as cherubim in Ezek 10:20). In Ps 18:10 the image of a cherub serves to personify the wind.
Psalm 99:1 tn The Hebrew verb נוּט (nut) occurs only here in the OT, but the meaning can be determined on the basis of the parallelism with רָגַז (ragaz, “tremble”) and evidence from the cognate languages (see H. R. Cohen, Biblical Hapax Legomena [SBLDS], 121).

New English Translation (NET)