Targum su Genesi 27:40

And upon thy sword shalt thou depend, entering at every place: yet thou shalt be supple and credulous, and be in subjection to thy brother; but it will be that when his sons become evil, and fall from keeping the commandments of the law, thou shalt break his yoke of servitude from off thy neck.

And by thy weapons thou shalt live, and before thy brother be subject. And it shall be when the sons of Jakob labour in the law, and keep the commandments, they will set the yoke of subjection on thy neck; but when the sons of Jakob withdraw themselves and study not the law, nor keep the commandments, behold, then shalt thou break their yoke of subjection from off thy neck.