Woodruff attributes priesthood restriction to Cain's murder of Abel.
Wilford Woodruff journal, October 16, 1894, MS 1352, CHL
16 I had several meetings with H. B. Clawson Concerning some of our Affairs in Calafornia. We had Meeting with several individuals among the rest Black Jane wanted to know if I would not let her have her Endowments in the Temple. This I Could not do as it was against the Law of God. As Cain killed Abel All the seed of Cain would have to wait for Redemption untill all the seed that Abel would have had that may Come through other men Can be redeemed.