Enoch 78:11-17
[11] During all the period during which the moon is growing in her light, she is transferring it to herself when opposite to the sun during fourteen days her light is accomplished in the heaven, and when she is illumined throughout, her light is accomplished full in the heaven.
[12] And on the first day she is called the new moon, for on that day the light rises upon her. [13] She becomes full moon exactly on the day when the sun sets in the west, and from the east she rises at night, and the moon shines the whole night through till the sun rises over against her and the moon is seen over against the sun.
[14] On the side whence the light of the moon comes forth, there again she wanes till all the light vanishes and all the days of the month are at an end, and her circumference is empty, void of light.
[15] And three months she makes of thirty days, and at her time she makes three months of twenty-nine days each, in which she accomplishes her waning in the first period of time, and in the first portal for one hundred and seventy-seven days.
[16] And in the time of her going out she appears for three months of thirty days each, and for three months she appears of twenty-nine each.
[17] At night she appears like a man for twenty days each time, and by day she appears like the heaven, and there is nothing else in her save her light.