Jubilees 8:5

And in the thirtieth jubilee, [1429 A.M.] in the second week, in the first year thereof, he took to himself a wife, and her name was Melka, the daughter of Madai, the son of Japheth, and in the fourth year [1432 A.M.] he begat a son, and called his name Shelah; for he said: 'Truly I have been sent.'