Exodus 2:1

There went a man, viz. Amram, Exodus 6:20; Numbers 26:58,Numbers 26:59 from the place of his abode to another place for the following purpose. A daughter of Levi, namely Jochebed, Numbers 26:59, called a

daughter, not strictly, but more largely, to wit, a grandchild, as the words father and son are oft used for a grandfather and a grandson, as hath been showed before: And so the word sister, Exodus 6:20, is to be taken largely, as brother is oft used for a cousin. This seems more probable than that an Israelite should marry his own sister, which even heathens by the light of nature have condemned, especially now when he had such abundant choice elsewhere.