'Day and Night' in the Bible

and, the four living creatures, each one of them, have severally six wings, round about and within, full of eyes; and they, cease, not, day and night, saying - Holy! holy! holy! Lord, God, the Almighty, - Who was, and Who is, and Who is coming.

For this cause, are they before the throne of God, and are rendering divine service unto him, day and night, in his sanctuary; and he that sitteth upon the throne shall spread his tent over them;

And I heard a loud voice in heaven, saying - Now, hath come the salvation, and the power, and the kingdom of our God, and the authority of his Christ; because the accuser of our brethren hath been cast out, who was accusing them before our God day and night;

and, the Adversary that had been deceiving them, was cast into the lake of fire and brimstone, where were both the wild-beast and the false-prophet; and they shall be tormented, day and night, unto the ages of ages.