'Day and Night' in the Bible

Will now thine ear be attentive and thine eye opened to hear to the prayer of thy servant which I pray before thee this day, day and night, for the sons of Israel thy servants, and confess for the sins of the sons of Israel which we sinned against thee? and and the house of my father sinned.

And we will pray to our God, and we shall set up a watch against them day and night, from before them.