2 Heb “the thirsty.” Parallelism suggests that dry ground is in view (see “dry land” in the next line.)
3 Heb “and streams”; “floods.” The verb “cause … to flow” is supplied in the second line for clarity and for stylistic reasons.
4 The Hebrew term בֵין (ven) is usually taken as a preposition, in which case one might translate, “among the grass.” But בֵין is probably the name of a tree (cf. C. R. North, Second Isaiah, 133). If one alters the preposition bet (בְּ) to kaf (ךְּ), one can then read, “like a binu-tree.” (The Qumran scroll 1QIsaa supports this reading.) This forms a nice parallel to “like poplars” in the next line. חָצִיר (khatsir) is functioning as an adverbial accusative of location.

In other versions

For I will pour water on the thirsty land,

and streams on the dry ground;

I will pour my Spirit upon your offspring,

and my blessing on your descendants.

They shall spring up among the grass

like willows by flowing streams.

For I will pour water on the thirsty land,

and streams on the dry ground;

I will pour out my Spirit on your offspring,

and my blessing on your descendants.

They will spring up like grass in a meadow,

like poplar trees by flowing streams.

For I will pour water on the thirsty land

and streams on the dry ground;

I will pour out my Spirit on your descendants

and my blessing on your offspring.

They will sprout among the grass

like poplars by flowing streams.

For I will pour out water to quench your thirst

and to irrigate your parched fields.

And I will pour out my Spirit on your descendants,

and my blessing on your children.

They will thrive like watered grass,

like willows on a riverbank.

For I will pour out water on a thirsty land

and streams on dry ground.

I will pour my spirit out on your descendants

and my blessing on your offspring.

And they shall sprout among the grass

like willows by a watercourse of water.

For I will pour water upon him that is thirsty,

And floods upon the dry ground:

I will pour my spirit upon thy seed,

And my blessing upon thine offspring:

And they shall spring up as among the grass,

As willows by the water courses.

Public Domain