Albert Barnes Commentary Psalms 89:8

"O Jehovah God of hosts, Who is a mighty one, like unto thee, O Jehovah? And thy faithfulness is round about thee." — Psalms 89:8 (ASV)

O Lord God of hosts — See the notes at (Isaiah 1:9); (Psalms 24:10). God, commanding the armies of heaven; leading forth the stars; controlling all forces — all powers.

Who is a strong Lord like unto thee? — The original word translated “Lord” here is יה Yâhh — or Jah. This is one of the few places where that word occurs, except in the compounding of words. It is an abbreviation of the name Yahweh and has the same meaning. See the notes at (Psalms 68:4). The meaning is that no one could be compared with Yahweh in respect to power.

Or to thy faithfulness round about thee? — Rather, “Your faithfulness is round about you.” That is, it attends you at all times; it is always with you; it is a part of your very nature.

To all round about you, you are faithful. Wherever God is — and he is everywhere — there is faithfulness. He never changes, and people and angels may always trust in him.

The psalmist then proceeds to illustrate the greatness of his power and his faithfulness in the works of creation.

The design of these illustrations, doubtless, is to keep before the mind the idea of the divine faithfulness as shown in the works of nature, and then to apply this to the covenant which had been made with David.

The idea is that he who is so faithful in nature will be the same in grace; that he who had shown such unchangeableness in the works of creation might be expected to show the same in respect to the promises which he had made.