They betook themselves to the one who carried out the words of Moses, (to) Aaron his brother, and Hur, the son of his sister. Whence (do we know) that Hur was the son of (Moses') sister? Because it is said, "And Caleb took unto him Ephrath, which bare him Hur" (1 Chron. 2:19). Why was Miriam's name called Ephrath?
Because she was a daughter of the palace, a daughter of kings, one of the magnates of the generation; for every prince and great man who arose in Israel had his name called an Ephrathite, as it is said, "And Jeroboam, the son of Nebat, an Ephrathite" (1 Kings 11:26); and it says, "And David was the son of that Ephrathite" (1 Sam. 17:12). Was he then an Ephrathite? Was he not of the tribe of Judah?
But he was a nobleman, a son of kings, one of the magnates of the generation. But since Hur was of the tribe of Judah, and one of the magnates of the generation, he began to reprove Israel with harsh words, and the plunderers who were in Israel arose against him, and slew him.