Midrasch zu Bereschit 41:47

And at that time the sons of Tarshish came against all the Ishmaelites to make war with them; ‎and the sons of Tarshish subdued the Ishmaelites for many days. And the Ishmaelites were ‎few in numbers in those days, and they could not prevail against the sons of Tarshish, and they ‎were sorely grieved. And the elders of the Ishmaelites sent a written appeal unto the king of ‎Egypt, saying: We pray thee to send unto thy servants, thy princes and thy hosts to help us in ‎fighting against the sons of Tarshish, for we are greatly oppressed since many days. And ‎Pharaoh sent Joseph, with his warriors and hosts as also the warriors of the king's house. And ‎they went into the land of Havilah to the Ishmael ites to assist them against the sons of ‎Tarshish. And the sons of Ishmael fought against the sons of Tarshish, and Joseph smote the ‎Tarshishites, and he took possession of their lands, and the sons of Ishmael dwell therein even ‎unto this day. And when the land of Tarshish was subdued, all the Tarshishites fled and came ‎to the boundary of the sons of Javan, and Joseph with all his men returned into the land of ‎Egypt—not one of them was missing. And it was when the year came around, which was the ‎second year of Joseph’s reigning over Egypt, the Lord gave great plenty throughout the land ‎for seven years, according to the words of Joseph, for the Lord hath blessed all the ‎productions of the land in those days for seven years, and they ate and were exceedingly ‎satisfied. And at that time Joseph appointed his officers to collect all the food of those good ‎years, and they heaped up the corn year after year, and they placed it into Joseph’s treasuries. ‎And at all times when they gathered the food Joseph commanded that the corn be brought in ‎the ears and with it also some of the soil of the field that it be not spoilt. And Joseph did in this ‎wise year after year, and he gathered up corn in great abundance even like the sand of the ‎sea, for his treasuries were beyond number. And the inhabitants of Egypt did likewise, and ‎they gathered up abundance of food into their storehouses, from all the food of the seven ‎good years; but they did not prepare it as Joseph did it. And all the food that Joseph and all the ‎people of Egypt heaped up, was to be stored away for the seven years of famine to sustain ‎the whole land. And all the inhabitants of Egypt filled their treasuries and store houses with ‎corn for their support in the famine. And Joseph stored all the food he gathered up, into the ‎cities of Egypt, and he closed up all the stores and placed guards around them. And Osnath, ‎the daughter of Potipheira, wife of Joseph, bare unto him two sons, Manasseh and Ephraim, ‎and Joseph was thirty-four years of age when he begat them.‎