Wesley's Notes on the Bible
The LORD reigneth; let the people tremble: he sitteth between the cherubims; let the earth be moved.
99:1 People - Such as are enemies to God and his people. Sitteth - Upon the ark. He is present with his people. Earth - The people of the earth. Moved - With fear and trembling.
The LORD is great in Zion; and he is high above all the people.
Let them praise thy great and terrible name; for it is holy.
99:3 Them - All people.
The king's strength also loveth judgment; thou dost establish equity, thou executest judgment and righteousness in Jacob.
99:4 Judgment - Though his dominion be absolute, and his power irresistible, yet he manages it with righteousness. The king's strength is by a known Hebraism put for the strong, or powerful king. Equity - In all thy proceedings.
Exalt ye the LORD our God, and worship at his footstool; for he is holy.
99:5 Foot - stool - Before the ark, which is so called, 1Chron 28:2. Holy - It is consecrated to be a pledge of God's presence.
Moses and Aaron among his priests, and Samuel among them that call upon his name; they called upon the LORD, and he answered them.
99:6 Moses - Moses before the institution of the priesthood executed that office, Exod 24:6. That call - Who used frequently and solemnly to intercede with God on the behalf of the people.
He spake unto them in the cloudy pillar: they kept his testimonies, and the ordinance that he gave them.
99:7 Spake - To some of them: to Moses and Aaron, Exod 19:24 33:9 - 11 1Sam 7:9, and c.
Thou answeredst them, O LORD our God: thou wast a God that forgavest them, though thou tookest vengeance of their inventions.
99:8 Them - The intercessors before mentioned. Forgavest - The people for whom they prayed, so far as not to inflict that total destruction upon them which they deserved;
Exalt the LORD our God, and worship at his holy hill; for the LORD our God is holy.