Book of Jasher 57:14
And the sons of Seir said unto the sons of Esau, You have seen andtherefore you know that this camp was on your account, and not one mighty man or an adept in war remaineth.
And the sons of Seir said unto the sons of Esau, You have seen andtherefore you know that this camp was on your account, and not one mighty man or an adept in war remaineth.