KJV: And after that came his brother out, and his hand took hold on Esau's heel; and his name was called Jacob: and Isaac was threescore years old when she bare them.
NASB: Afterward his brother came forth with his hand holding on to Esau's heel, so his name was called Jacob; and Isaac was sixty years old when she gave birth to them.
KJV: And it came to pass, that when Isaac was old, and his eyes were dim, so that he could not see, he called Esau his eldest son, and said unto him, My son: and he said unto him, Behold, here am I.
NASB: Now it came about, when Isaac was old and his eyes were too dim to see, that he called his older son Esau and said to him, "My son." And he said to him, "Here I am."