Henock 72:25-26 (from the Ethiopian text, numbering by R.H Charles)
25. And the sun rises on that day from that second portal and sets in the west in the second portal, and returns to the east into the first portal for one-and-thirty mornings, and sets in the first portal in the west of the heaven. 26. And on that day the night becomes longer and amounts to the double of the day: and the night amounts exactly to twelve parts and the day to six.