'Day and Night' in the Bible

And the four living creatures, each one of them having six wings, are full of eyes all over and within [underneath their wings]; and day and night they never stop saying,“Holy, holy, holy [is the] Lord God, the Almighty [the Omnipotent, the Ruler of all], who was and who is and who is to come [the unchanging, eternal God].”

For this reason, they are [standing] before the throne of God; and they serve Him [in worship] day and night in His temple; and He who sits on the throne will spread His tabernacle over them and shelter and protect them [with His presence].

Then I heard a loud voice in heaven, saying,“Now the salvation, and the power, and the kingdom (dominion, reign) of our God, and the authority of His Christ have come; for the accuser of our [believing] brothers and sisters has been thrown down [at last], he who accuses them and keeps bringing charges [of sinful behavior] against them before our God day and night.

And the devil who had deceived them was hurled into the lake of fire and burning brimstone (sulfur), where the beast (Antichrist) and false prophet are also; and they will be tormented day and night, forever and ever.