Henock 72:19-20 (from the Ethiopian text, numbering by R.H Charles)
19. And the sun goes forth from that fifth portal and sets in the fifth portal of the west, and rises in the fourth portal for one-and-thirty mornings on account of its sign, and sets in the west. 20. On that day the day is equalized with the night, [and becomes of equal length], and the night amounts to nine parts and the day to nine parts.