Genesis 41:46 - From the Pit to the Palace

And Joseph was thirty years old when he stood before Pharaoh king of Egypt. And Joseph went out from the presence of Pharaoh, and went throughout all the land of Egypt.

After 13 years of bondage Joseph stood before Pharaoh king of Egypt just as David stood before King Saul; they were liked immediately and made to be the king's right-hand man (Genesis 37:2; 1 Samuel 16:21).

Genesis 39:6 - A Good-looking Man

And he left all that he had in Joseph's hand; and he knew not ought he had, save the bread which he did eat. And Joseph was a goodly person, and well favoured.

There is a marked resemblance between Joseph's appearance and that of King David, they were both well-known for their striking handsomeness (1 Samuel 16:12 NIV).

Genesis 36:31 - Before Israel had a king

And these are the kings that reigned in the land of Edom, before there reigned any king over the children of Israel.

The children of Israel didn't have a king until about seven hundred years later when Samuel introduced Saul as the man the LORD had chosen to be their king (1 Samuel 10:24).