Numbers 20:21

But Sihon would not allow Israel to pass through his border. So Sihon gathered all his people and went out to meet Israel in the wilderness and came to Jahaz and fought against Israel.

and command the people, saying, “You are going to pass through the territory of your brothers the sons of Esau who live in Seir; and they will be afraid of you. So be very careful;

‘For when they came up from Egypt, and Israel went through the wilderness to the Red Sea and came to Kadesh,

then Israel sent messengers to the king of Edom, saying, “Please let us pass through your land,” but the king of Edom would not listen. And they also sent to the king of Moab, but he was not willing. So Israel remained at Kadesh.

“So now, behold, the sons of Ammon and Moab and Mount Seir, whom You did not let Israel invade when they came out of the land of Egypt (they turned aside from them and did not destroy them),

Thus says Yahweh, “For three transgressions of Edom and for four I will not turn back its punishment Because he pursued his brother with the sword While he corrupted his compassion; And his anger also tore continually, And he kept his wrath forever.