Isaiah 40:8

6 The voice said, Cry. And he said, What shall I cry? All flesh is grass, and all the goodliness thereof is as the flower of the field:

7 The grass withereth, the flower fadeth: because the spirit of the LORD bloweth upon it: surely the people is grass.

The grass withereth, the flower fadeth: but the word of our God shall stand for ever.

9 O Zion, that bringest good tidings, get thee up into the high mountain; O Jerusalem, that bringest good tidings, lift up thy voice with strength; lift it up, be not afraid; say unto the cities of Judah, Behold your God!

10 Behold, the Lord GOD will come with strong hand, and his arm shall rule for him: behold, his reward is with him, and his work before him.

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

Compare

BSB
The grass withers and the flowers fall, but the word of our God stands forever.”
KJV
The grass withereth, the flower fadeth: but the word of our God shall stand for ever.
WEB
The grass withers, the flower fades; but the word of our God stands forever.”
ASV
The grass withereth, the flower fadeth; but the word of our God shall stand forever.
DARBY
The grass withereth, the flower fadeth; but the word of our God abideth for ever.
BLB
The grass withers, the flower fades, and the word of our God stands forever.”
ÅB
Gresset blir tørt, blomsten visner; men vår Guds ord står fast til evig tid.
OTB
Gresset visner og blomstene falmer, men vår Guds ord varer evig.
B1930
Gresset blir tørt, blomsten visner; men vår Guds ord står fast til evig tid.

Study notes (Tyndale)

Original text and word study

Cross references