'Day and Night' in the Bible

"And will not God see justice done to his elect who are crying unto him day and night, even if he seems to delay helping them?

but information of their plot was given Saul, and although they kept watch day and night on the gates, in order to make away with him,

You recall, brothers, my labor and toil; how, while working at my trade day and night, so as not to become a burden to any of you, I proclaimed to you the gospel of God.

Now she who is a widow indeed, and desolate, has fixed her hope on God, and devotes herself to supplications and prayers, day and night.

And the four Living Creatures, each one with six wings, are full of eyes round about and within; day and night they are chanting ceaselessly. "Holy, holy, holy is the Lord God, the Almighty. Who was, and who is, and who is to come."

For this they are now before the throne of God, and are serving him day and night in his temple. "And He who sits on the throne Will spread his tabernacle over them.

And I heard a great voice in heaven, which said: "Now it is come! the salvation and the power, The kingdom of our God, and the authority of his Christ! For the accuser of our brethren is thrown down, Who accused them before our God, day and night.

and the devil who had been deceiving them was hurled into the lake of fire and brimstone, where lie also the beast and the false prophet. And they will be tortured day and night, forever and ever.