Simplify the following text for a Grade 3 native English-speaking person.
Original: According to Livy , Hannibal much later said that when he came upon his father and begged to go with him , Hamilcar agreed and demanded that he swear that as long as he lived he would never be a friend of Rome .
Simplified: He begged to go with his father . Hamilcar said yes and made Hannibal promise that he would never be a friend of Rome .