New King James Version
Behold, He who keeps Israel Shall neither slumber nor sleep.

King James Bible
Behold, he that keepeth Israel shall neither slumber nor sleep.

American Standard Version
Behold, he that keepeth Israel Will neither slumber nor sleep.

Berean Study Bible
Behold, the Protector of Israel will neither slumber nor sleep.

Douay-Rheims Bible
Behold he shall neither slumber nor sleep, that keepeth Israel.

English Revised Version
Behold, he that keepeth Israel shall neither slumber nor sleep.

World English Bible
Behold, he who keeps Israel will neither slumber nor sleep.

Young's Literal Translation
Lo, He slumbereth not, nor sleepeth, He who is preserving Israel.

Psalm 121:4 Additional Translations ...