54 Heb “the ends of the earth,” but this is a merism, where the earth’s extremities stand for its entirety, i.e., the extremities and everything in between them.
55 Exiled Israel’s complaint (v. 27) implies that God might be limited in some way. Perhaps he, like so many of the pagan gods, has died. Or perhaps his jurisdiction is limited to Judah and does not include Babylon. Maybe he is unable to devise an adequate plan to rescue his people, or is unable to execute it. But v. 28 affirms that he is not limited temporally or spatially nor is his power and wisdom restricted in any way. He can and will deliver his people, if they respond in hopeful faith (v. 31a).

In other versions

Have you not known? Have you not heard?

The Lord is the everlasting God,

the Creator of the ends of the earth.

He does not faint or grow weary;

his understanding is unsearchable.

Do you not know?

Have you not heard?

The Lord is the everlasting God,

the Creator of the ends of the earth.

He will not grow tired or weary,

and his understanding no one can fathom.

Do you not know?

Have you not heard?

The Lord is the everlasting God,

the Creator of the whole earth.

He never becomes faint or weary;

there is no limit to his understanding.

Have you never heard?

Have you never understood?

The Lord is the everlasting God,

the Creator of all the earth.

He never grows weak or weary.

No one can measure the depths of his understanding.

Have you not known,

or have you not heard?

Yahweh is the God of eternity,

the creator of the ends of the earth!

He is not faint, and he does not grow weary!

There is no searching his understanding.

Hast thou not known? hast thou not heard,

That the everlasting God, the Lord,

The Creator of the ends of the earth,

Fainteth not, neither is weary?

There is no searching of his understanding.

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