'Day and Night' in the Bible

Let your ear now take note and let your eyes be open, so that you may give ear to the prayer of your servant, which I make before you at this time, day and night, for the children of Israel, your servants, while I put before you the sins of the children of Israel, which we have done against you: truly, I and my father's people are sinners.

But we made our prayer to God, and had men on watch against them day and night because of them.