Jubilees 10:18

And in the three and thirtieth jubilee, in the first year in the second week, Peleg took to himself a wife, whose name was Lomna the daughter of Sina'ar, and she bare him a son in the fourth year of this week, and he called his name Reu; for he said: 'Behold the children of men have become evil through the wicked purpose of building for themselves a city and a tower in the land of Shinar.'