Now listen, Moses! The Amalekites and the Canaanites live in the valleys of Canaan. And tomorrow morning, you'll need to turn round and head back into the desert towards the Red Sea.
The Israelites had to go around the territory of Edom, so when they left Mount Hor, they headed south towards the Red Sea. But along the way, the people became so impatient
And when the Egyptian army chased you in their chariots, you saw the LORD drown them and their horses in the Red Sea. Egypt still suffers from that defeat!
A little later, the Israelites set out into the desert, going east of Edom and Moab, and camping on the eastern side of the gorge of the River Arnon. The Arnon is the eastern border of Moab, and since the Israelites didn't cross it, they didn't even set foot in Moab.