Musar zu Bereschit 48:1

At the time Jacob made his request that Joseph bury him in the land of Israel, he did not hold out any promise of reward for Joseph when he requested his promise to bury him in the land of Israel. Neither did Jacob use the opportunity to apologize for burying Joseph's mother in the middle of nowhere instead of with his, Jacob's ancestors. By his withholding any promises or apologies Jacob made sure that Joseph should acquire the merit of performing an act of גמילות חסד that was totally altruistic. Once Joseph had promised his father to bury him in the land of Israel, and had sworn an oath concerning this, -on a different occasion,- as attested to by the words ויהי אחרי הדברים האלה, "It was after these events," in 48,1, Jacob did explain why he had buried Rachel where he did, and that Joseph would inherit in the land of Israel as if he had been his firstborn son, etc. All of this occurred after Jacob had been taken ill.

But, in truth, all this was "measure for measure." Because of their sitting to eat bread when Joseph was in the pit, it was decreed upon them to also sit and eat bread under terrifying circumstances, until Judah himself said (Ibid. 44:16): "What shall we speak and how shall we justify ourselves? G-d has found out the sin of your servants." [And he, taking upon himself the din of Heaven, as it were,] — "Behold, we are slaves to my lord, etc." And with this, he averts the essential din for the selling [of Joseph]. [And though Joseph is not yet reconciled in this parshah and says (Ibid. 17): "The man in whose hand the goblet is found — he shall be my servant. And you, go up in peace to your father," Judah does not agree to this, viz. (Ibid. 18): "And Judah drew near to him," until the end of the episode, (Ibid. 45:1): "And Joseph could not restrain himself, etc."]