Isaiah 40:28

26 Lift up your eyes on high: Who created all these? He leads forth the starry host by number; He calls each one by name. Because of His great power and mighty strength, not one of them is missing.

27 Why do you say, O Jacob, and why do you assert, O Israel, “My way is hidden from the LORD, and my claim is ignored by my God”?

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; His understanding is beyond searching out.

29 He gives power to the faint and increases the strength of the weak.

30 Even youths grow tired and weary, and young men stumble and fall.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB
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; His understanding is beyond searching out.
KJV
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.
WEB
Haven’t you known? Haven’t you heard? The everlasting God, the LORD, the Creator of the ends of the earth, doesn’t faint. He isn’t weary. His understanding is unsearchable.
ASV
Hast thou not known? hast thou not heard? The everlasting God, Jehovah, the Creator of the ends of the earth, fainteth not, neither is weary; there is no searching of his understanding.
DARBY
Dost thou not know, hast thou not heard, that the everlasting God, Jehovah, the Creator of the ends of the earth, fainteth not nor tireth? There is no searching of his understanding.
BLB
Have you not known? Or have you not heard? God everlasting [is] YHWH, the Creator of the ends of the earth. He does not faint and He does not grow weary; [there is] no searching out of His understanding.
ÅB
Vet du det ikke, eller har du ikke hørt det? Herren er en evig Gud, den som har skapt jordens ender; han blir ikke trett, og han blir ikke mødig; hans forstand er uransakelig.
OTB
Vet dere ikke? Har dere ikke hørt? Herren er den evige Gud, Skaperen av jordens ender. Han blir ikke trett eller sliten, og Hans forståelse er utenfor menneskelig rekkevidde.
B1930
Vet du det ikke, eller har du ikke hørt det? Herren er en evig Gud, den som har skapt jordens ender; han blir ikke trett, og han blir ikke mødig; hans forstand er uransakelig.

Study notes (Tyndale)

Original text and word study

Cross references