New Defender's Study Bible Notes
6:9 hearkened not unto Moses. Although the people had hearkened to God’s Word through Aaron when he and Moses first came to them, the intensification of their persecution as a result had caused them to change their minds.
6:13 spake unto Moses. This same commission had previously been given to Moses while he was still in Midian (Exodus 3:10). Now, evidently because of the discouragement he had received so far, God again spoke to him in Egypt, and renewed the commission.
6:17 sons of Gershon. In Exodus 6:16-19, the genealogy from Levi to Moses through Kohath and Amram is abbreviated to just four generations, although the stay in Egypt is said to be 430 years (Exodus 12:40-41). Note, however, that approximately this same period from Ephraim (a son of Joseph) to Joshua involved ten generations (I Chronicles 7:22-27). It is thus possible that the Levi-to-Moses genealogy gave only the four “major” ancestors of Moses, corresponding roughly to the 430-year stay of Israel in Egypt. However, see also the notes on Genesis 15:16.