Reference: Ethiopian Woman
According to Nu 12:1 (Jewish Encyclopedia), when the children of Israel were at Hazeroth, Miriam and Aaron 'spake against' Moses on account of his marriage with an Ethiopian (RV 'Cushite') woman. As the 'Ethiopian woman' is mentioned nowhere else, and the death of Moses' wife Zipporah is not recorded, some of the early interpreters thought the two must be identical; and this view is favoured by the Jewish expositors. But it is more likely that a black slave-girl is meant, and that the fault found by Miriam and Aaron was with the indignity of such a union. It may perhaps be inferred from the context that the marriage was of recent occurrence.