29 And at the close of the nineteenth jubilee, in the seventh week in the sixth year [930 A.M.] thereof, Adam died, and all his sons buried him in the land of his creation, and he was the first to be buried in the earth. 30 And he lacked seventy years of one thousand years; for one thousand years are as one day in the testimony of the heavens and therefore was it written concerning the tree of knowledge: 'On the day that ye eat thereof ye shall die.' For this reason he did not complete the years of this day; for he died during it.

He [God] did not specify to Adam if it would be a day of his [own days] or a day of God's, which lasts one thousand years, since 'a thousand years in your [God's] sight are like yesterday' [Ps. 90:4].