 The Midrash taught that Og intended that Abram should go out and be killed.God rewarded Og for delivering the message by allowing him to live all the years from Abraham to Moses, but God collected Og's debt to God for his evil intention toward Abraham by causing Og to fall by the hand of Abraham's descendants.On coming to make war with Og, Moses was afraid, thinking that he was only 120 years old, while Og was more than 500 years old, and if Og had not possessed some merit, he would not have lived all those years.