Psalm 135:20 in the King James Version
Bless the LORD, O house of Levi: ye that fear the LORD, bless the LORD.
Context
19 House of Israel, praise the LORD! House of Aaron, praise the LORD!
20 House of Levi, praise the LORD! You who fear the LORD, praise the LORD!
21 Blessed be the LORD from Zion, who dwells in Jerusalem. Praise the LORD!