Genesis 27:40 in the King James Version
And by thy sword shalt thou live, and shalt serve thy brother; and it shall come to pass when thou shalt have the dominion, that thou shalt break his yoke from off thy neck.
Context
39 Isaac his father answered him, “Behold, your dwelling will be of the fatness of the earth, and of the dew of the sky from above.
40 You will live by your sword, and you will serve your brother. It will happen, when you will break loose, that you will shake his yoke from off your neck.”
41 Esau hated Jacob because of the blessing with which his father blessed him. Esau said in his heart, “The days of mourning for my father are at hand. Then I will kill my brother Jacob.”