Midrasch zu Bereschit 41:57

The third king was Joseph, who ruled from one end of the world to the other, as it is said, "And all the earth came || into Egypt to Joseph" (Gen. 41:57). It is not written here "Egypt came," but "they came into Egypt," for they brought their tribute and their presents to Joseph to buy (corn); for forty years he was second to the king, and for forty years he was king alone, as it is said, "Now there arose a new king over Egypt" (Ex. 1:8).