Of course, some could view what follows as an endorsement of mixed marriage (note that sources I found said “Ethiopian” means “Cushite.” That may be more illuminating to you than it is to me.)
Numbers 12:1 through whatever (KJV):
**And Miriam and Aaron spake against Moses because of the Ethiopian woman whom he had married: for he had married an Ethiopian woman. ** 2 And they said, Hath the LORD indeed spoken only by Moses? hath he not spoken also by us? And the LORD heard it. 3 (Now the man Moses was very meek, above all the men which were upon the face of the earth.)
4 And the LORD spake suddenly unto Moses, and unto Aaron, and unto Miriam, Come out ye three unto the tabernacle of the congregation. And they three came out. 5 And the LORD came down in the pillar of the cloud, and stood in the door of the tabernacle, and called Aaron and Miriam: and they both came forth. 6 And he said, Hear now my words: If there be a prophet among you, I the LORD will make myself known unto him in a vision, and will speak unto him in a dream. 7 My servant Moses is not so, who is faithful in all mine house. 8 With him will I speak mouth to mouth, even apparently, and not in dark speeches; and the similitude of the LORD shall he behold: wherefore then were ye not afraid to speak against my servant Moses? 9** And the anger of the LORD was kindled against them; and he departed. **
**10 And the cloud departed from off the tabernacle; and, behold, Miriam became leprous, ** white as snow: and Aaron looked upon Miriam, and, behold, she was leprous.
**Yes, I KNOW that God seems a lot more pissed off at their snarkiness and envy toward Moses than at the fact that they are prejudiced. ** But given the fact that God isn’t exactly shy about letting Moses know when he thinks he’s screwed up, I’m guessing that if God had had a problem with the marriage, he would have said so.