And Amram took Jochebed his aunt for himself as a wife, and she bore for him Aaron and Moses, and the years of the life of Amram [were] {one hundred and thirty-seven years}.

You shall not uncover the nakedness of your father's brother, you shall not approach to his wife: she is your aunt.

As for a man who lies with his aunt, he has exposed his uncle's nakedness--they shall bear their sin; they shall die childless.