Psalm 4 is clearly the prayer of a person preparing themselves for bed: ‘In peace I will lie down and sleep, for you alone, Lord, make me dwell in safety’ (v. 8). But its successor, Psalm 5, is a prayer for the start of a new day: ‘In the morning, Lord, you hear my voice; in the morning I lay my requests before you and wait expectantly’ (v. 3). The very first Psalm describes the blessing of meditating ‘day and night’ on God’s word (1:2).