17 Heb “sprout up,” like crops. This verse continues the metaphor of rain utilized in v. 6.
18 Heb “and [there will be an] abundance of peace until there is no more moon.”
19 The prefixed verbal form is a (shortened) jussive form, indicating this is a prayer of blessing.
20 From sea to sea. This may mean from the Mediterranean Sea in the west to the Dead Sea in the east. See Amos 8:12. The language of this and the following line also appears in Zech 9:10.
21 Heb “the river,” a reference to the Euphrates.

In other versions

In his days may the righteous flourish,

and peace abound, till the moon be no more!

May he have dominion from sea to sea,

and from the River to the ends of the earth!

In his days may the righteous flourish

and prosperity abound till the moon is no more.

May he rule from sea to sea

and from the River to the ends of the earth.

May the righteous flourish in his days

and well-being abound

until the moon is no more.

May he rule from sea to sea

and from the Euphrates

to the ends of the earth.

May all the godly flourish during his reign.

May there be abundant prosperity until the moon is no more.

May he reign from sea to sea,

and from the Euphrates River to the ends of the earth.

May what is right blossom in his days

and an abundance of peace, until the moon is no more.

And may he rule from sea up to sea,

and from the River to the edges of the land.

In his days shall the righteous flourish;

And abundance of peace so long as the moon endureth.

He shall have dominion also from sea to sea,

And from the river unto the ends of the earth.

Public Domain