Now Esau hated Jacob because of the blessing with which his father had blessed him, and Esau said to himself, “The days of mourning for my father are approaching; then I will kill my brother Jacob.”
Thus says the Lord: “For three transgressions of Edom, and for four, I will not revoke the punishment; because he pursued his brother with the sword, and cast off all pity, and his anger tore perpetually, and he kept his wrath for ever.
Israel then sent messengers to the king of Edom, saying, ‘Let us pass, we pray, through your land’; but the king of Edom would not listen. And they sent also to the king of Moab, but he would not consent. So Israel remained at Kadesh.
But Sihon did not trust Israel to pass through his territory; so Sihon gathered all his people together, and encamped at Jahaz, and fought with Israel.