In peace I will lie down and sleep, for you alone, O LORD, will keep me safe. (Psalm 4:8, NLT)
Scripture before sleeping may prompt prayers. God's word, in and of itself can be a prayer. "To the Lord I cry....I lie down and sleep....and will not fear" (Psalm 3:4-6) and David concludes in 4:8, for you alone, O Lord, make me dwell in safety.
"It's David's confidence in God that enables him to lay himself down calmly and tranquilly to sleep, whatever dangers threaten him. He seeks his couch, and at once (יחדּו) slumber visits him. No anxious thoughts keep him tossing on his bed for hours." (http://biblehub.com/psalms/4-8.htm) Confidence in God comes from knowing Him through His word.
Anne Graham Lotz's, endorsed Daily Light for Every Day, includes morning and evening prayers. Equal scripture content for both. The "Graham/Lotz families read this "little" collection each day. It keeps them all on the same page.
Last night I read the 5/16 entry from Daily Light and prayed those "very" appropriate verses for a decision a dear friend would be making on that "very" day. Grateful for the "velodi-TEA of conviction that had me speedily changing my direction of evening prayers.