Psalm 3:5
I laid me down and slept; I awaked; for the LORD sustained me.
Torrey's Topical Textbook—AKJV

Psalm 4:8
I will both lay me down in peace, and sleep: for you, LORD, only make me dwell in safety.
Torrey's Topical Textbook—AKJV

Proverbs 3:24
When you lie down, you shall not be afraid: yes, you shall lie down, and your sleep shall be sweet.
Torrey's Topical Textbook—AKJV