Midrash su Genesi 42:15

In what lies in the other ark it is written (Exodus 20) "I am the L rd your G d," and of Joseph it is written (Genesis 50:19) "Am I in the place of G d?" In what lies in this ark it is written (Exodus 20) "There shall not be before you any other gods," and of Joseph it is written (Genesis 42:18) "It is G d whom I fear." (Exodus 20) "You shall not take the name of the L rd your G d in vain." And of Joseph it is written (Genesis 42:15) "By the life of Pharaoh," (Joseph not swearing by "the life" of the L rd.) (Exodus 20) "Remember the Sabbath day." Joseph (Genesis 42:16) "slaughter an animal and prepare it," "prepare" alluding to Sabbath eve, it being written here "prepare," and elsewhere (Exodus 16:5) "And it shall be on the sixth day that they shall prepare." (Exodus 20) "Honor your father." Joseph (Genesis 37:13) "And Israel said to Joseph: Are your brothers not grazing (the sheep) in Shechem? Go, and I will send you to them. And he said to him: Here I am" (at your service). Joseph knew that his brothers hated him, but he would not transgress the words of his father. (Exodus 20) "You shall not kill." He did not kill Potiphar (even though he could have.) (Exodus 20) "You shall not commit adultery." He did not commit adultery with the wife of Potiphar. (Exodus 20) "You shall not steal." He did not rob Pharaoh, viz. (Genesis 47:14) "And Joseph collected all of the money, etc." (Exodus 20) "You shall not testify falsely against your neighbor." Joseph did not tell his father what his brothers had done to him. Now does this not follow a fortiori, viz.: If he did not testify (against them) even truthfully, how much more so, falsely! (Exodus 20) "You shall not covet." He did not covet Potiphar's wife.

This is what God said to Israel: My children what do I seek from you? I seek no more than that you love one another, and honor one another, and that you have awe for one another

"And Yosef saw his brothers, etc." - Rabbi Yehoshua bar Nechemiah said, "He made himself a stranger (nocri) to them. "And Yosef recognized his brothers, etc." - Rabbi Levi and the Rabbis [argued about this]: Rabbi Levi said, "At the time they fell into his hand, 'And Yosef recognized his brothers;' at the time he fell into their hands, 'and they did not recognize him.'" And the Rabbis said, "He who left them adorned by beards, 'And Yosef recognized his brothers - and they did not recognize him,' as they did not leave him adorned by a beard [as he was too young].""And Yosef remembered, etc... and he said to them, etc...'we are all the sons of one man'" - they had a flash of Divine inspiration [in which] they said to him, "We and you are the sons of one man, we are." He said to them, "And where is [the other one]?" "We sold him." He said to them, "For how much did you sell him?" They said to him, "For five sela."He said to them, "And if a person would say to you, 'Give me five sela and I will give him to you,' would you do it?" They said to him, "Yes." "And if a person would say to you, 'Give me double and I will give him to you,' would you do it?" They said, "Yes." "And if a person would say to you, '[Even] if you would give me a thousand, I will not give him to you,' what would you do?" They said to him, "For that have we come down [to Egypt], whether to kill or to be killed." He said to them, "'This is what I have said about you, spies, etc.'" "Through this will you be examined; by the life of Pharaoh" - when he wanted to make a false oath, he would swear by the life of Pharaoh. Rabbi Levi said, "There is a parable of a goat that ran away from the pasture and went in to a widow. What did she do? She got up and slaughtered it and flayed it and put it in her bed and covered it with a sheet. They came to request it from her. She said, 'So should happen to this woman if she knows about it, this flesh [actually referring to the goat] should be bitten and eaten.' So too, 'by the life of Pharaoh if you will get out, etc...Send one of you.'" "And he placed them in the prison for three days" - never does the Holy One, blessed be He, leave righteous ones in dire straits for three days and so was it taught to Yosef, to Yonah, to Mordechai, to David. And so is it stated (Hoshea 6:2), "He will revive us from the two days; on the third day" of the tribes, "He will bring us up" - "And Yosef said to them on the third day."