After the golden calf, what did God say He would send ahead of Israel?

Answer: An angel

God said He would send an angel before Israel and drive out the Canaanites, Amorites, Hittites, Perizzites, Hivites and Jebusites.

“And I will send an angel before you, and I will drive out the Canaanites, Amorites, Hittites, Perizzites, Hivites, and Jebusites.”— Exodus 33:2 (BSB)