'Day and Night' in the Bible

Instead, his delight is in the Lord’s instruction,and he meditates on it day and night.

For day and night Your hand was heavy on me;my strength was drainedas in the summer’s heat.Selah

My tears have been my food day and night,while all day long people say to me,“Where is your God?”

day and night they make the rounds on its walls.Crime and trouble are within it;

A song. A psalm of the sons of Korah. For the choir director: according to Mahalath Leannoth. A Maskil of Heman the Ezrahite.Lord, God of my salvation,I cry out before You day and night.