2 Enoch

Those men showed me the other course, that of the moon, twelve great gates, crowned from west to east, by which the moon goes in and out of the customary times.

It goes in at the first gate to the western places of the sun, by the first gates with (thirty) -one (days) exactly, by the second gates with thirty-one days exactly, by the third with thirty days exactly, by the fourth with thirty days exactly, by the fifth with thirty-one days exactly, by the sixth with thirty-one days exactly, by the seventh with thirty days exactly, by the eighth with thirty-one days perfectly, by the ninth with thirty-one days exactly, by the tenth with thirty days perfectly, by the eleventh with thirty-one days exactly, by the twelfth with twenty-eight days exactly.