огонь непрестанно пусть горит на жертвеннике и не угасает.
The fire must be kept burning on the altar continuously; it must not go out.
Fire shall be kept burning on the altar continually; it shall not go out.
‘Fire shall be kept burning continually on the altar; it is not to go out.
Remember, the fire must be kept burning on the altar at all times. It must never go out.
The fire shall ever be burning upon the altar; it shall never go out.
A fire shall always be burning on the altar; it shall never go out.
A continual fire shall be kept burning on the altar: it shall never go out.