What did abrahams son Isacc do?

Answer 1

In his old age Isaac was visually impared and so unknowingly gave his blessing to the younger son Jacob rather than the Eldest son Esau, because Jacob and his mother divised a plan to trick Isaac into giving Jacob the blessing. When Esau came back from hunting an realised what had happened he beg his father if there was any blessing left for him but there wasnt, so Esau planned to kill his brother Jacob for stealing his blessing. When the mother (Rebekah) learned of this she sent Jacob away to another land where his uncle lived. For details on as to how Isaac was tricked etc read Genesis Chapter 27. Hope the above answered your question:-)