Isaiah 40:7

5 And the glory of the LORD shall be revealed, and all flesh shall see it together: for the mouth of the LORD hath spoken it.

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:

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

8 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!

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 when the breath of the LORD blows on them; indeed, the people are grass.
KJV
The grass withereth, the flower fadeth: because the spirit of the LORD bloweth upon it: surely the people is grass.
WEB
The grass withers, the flower fades, because the LORD’s breath blows on it. Surely the people are like grass.
ASV
The grass withereth, the flower fadeth, because the breath of Jehovah bloweth upon it; surely the people is grass.
DARBY
The grass withereth, the flower fadeth, for the breath of Jehovah bloweth upon it: surely the people is grass.
BLB
The grass withers, the flower fades, because the breath of YHWH blows on it. Surely the people [are] grass.
ÅB
Gresset blir tørt, blomsten visner når Herrens ånde blåser på det; ja sannelig, folket er gress.
OTB
Gresset visner og blomstene falmer, fordi Herrens ånde blåser på dem. Sannelig, folket er gress.
B1930
Gresset blir tørt, blomsten visner når Herrens ånde blåser på det; ja sannelig, folket er gress.

Study notes (Tyndale)

Original text and word study

Cross references