# Edom

"the people of Edom"

# he pursued his brother

"they pursued their brothers, the people of Israel." The people of Edom and the people of Israel were the descendants of Esau and Jacob, who were brothers. 

# cast off all pity

"showed them no mercy"

# His anger tore them apart continually

"He was angry and continued to do great harm to them." If your language has a word for "tear apart" that implies that the subject is an animal, you might want to use it here. 

# his wrath lasted forever

"he stayed angry forever"