Amos 1:11

Thus saith the Lord, For three transgressions of Edom, and for four, I will not turn away the punishment thereof, refusing, also in this instance, to give them any consideration after once their doom was decided upon, because he did pursue his brother with the sword, in the ineradicable hatred which always marked the attitude of the Edomites against Israel and Judah, and did cast off all pity, deliberately smothering every feeling of compassion, and. his anger did tear perpetually, being bent upon murder, and he kept his wrath forever;