3 Know that the LORD has set apart his faithful servant for himself; the LORD hears when I call to him.

Read Psalm 4:3 Using Other Translations

But know that the LORD hath set apart him that is godly for himself: the LORD will hear when I call unto him.
But know that the LORD has set apart the godly for himself; the LORD hears when I call to him.
You can be sure of this: The LORD set apart the godly for himself. The LORD will answer when I call to him.