Midrash sobre Job 18:17

As to Jacob, the Holy One, named him also, as it is said: And his name was called Jacob (ibid. 25:26). The four letters in Jacob’s name in Hebrew correspond to the four crowns through which his descendants adored the Holy One, blessed be He. The yod corresponds to the Ten Commandments, the ayin (seventy) corresponds to the seventy elders, the kuf (one hundred) to the Temple, which was one hundred cubits high, that his descendants erected for the Holy One, blessed be He, as it is said: And he measured the house, a hundred cubits (Ezek. 41:13), and the bet (two) corresponds to the two tablets on which were inscribed the Ten Commandants. They were redeemed from Egypt by Jacob’s merit, as it is said: And He established it unto Jacob for a statute (Ps. 105:10). Were it not for Jacob, Abraham would not have been redeemed from the furnace, as it is said: Therefore, thus saith the Lord, who redeemed Abraham, concerning the house of Jacob (Isa. 29:22). However, as for Esau, his father and mother named him, as it is said: And they called his name Esau (Gen. 25:25). About him, Scripture states: His remembrance shall perish from the earth, and he shall have no name abroad (Job 18:7).