Henock 72:23-24 (from the Ethiopian text, numbering by R.H Charles)
23. And the sun rises from that third portal and sets in the third portal in the west and returns to the east, and for thirty mornings rises in the second portal in the east, and in like manner sets in the second portal in the west of the heaven. 24. And on that day the night amounts to eleven parts and the day to seven parts.