When the Canaanite, the king of Arad, who lived in the Negeb, heard that Israel was coming by the way of Atharim, he fought against Israel and took some of them captive.
Then Israel made a vow to the Lord and said, "If you will indeed give this people into our hands, then we will utterly destroy their towns."
The Lord listened to the voice of Israel, and handed over the Canaanites; and they utterly destroyed them and their towns; so the place was called Hormah.
References for Numbers 21:3
From Mount Hor they set out by the way to the Red Sea, to go around the land of Edom; but the people became impatient on the way.
References for Numbers 21:4
The people spoke against God and against Moses, "Why have you brought us up out of Egypt to die in the wilderness? For there is no food and no water, and we detest this miserable food."
Then the Lord sent poisonous serpents among the people, and they bit the people, so that many Israelites died.
References for Numbers 21:6