Genesis 47:29

29.And he called his son Joseph. Hence we infer, not only the anxiety of Jacob, but his invincible magnanimity. It is a proof of great courage, that none of the wealth or the pleasures of Egypt could so allure him, as to prevent him from sighing for the land of Canaan, in which he had always passed a painful and laborious life. But the constancy of his faith appeared still more excellent, when he, commanding his dead body to be carried back to Canaan, encouraged his sons to hope for deliverance. Thus it happened that he, being dead, animated those who were alive and remained, as with the sound of a trumpet. For, to what purpose was this great care respecting his sepulture, except that the promise of God might be confirmed to his posterity? Therefore, though his faith was tossed as upon the waves, yet it was so far from suffering shipwreck, that it conducted others into the haven. Moreover, he demands an oath from his son Joseph, not so much on account of distrust, as to show that a matter of the greatest consequence was in hand. Certainly he would not, by lightly swearing, profane the name of God: but the more sacred and solemn the promise was, the more ought all his sons to remember, that it was of great importance that his body should be carried to the sepulcher of his fathers. It is also probable that he prudently thought of alleviating any enmity which might be excited against his son Joseph. For he knew that this choice of his sepulcher would be, by no means, gratifying to the Egyptians; seeing it seemed like casting a reproach on their whole kingdom. This stranger, forsooth, as if he could find no fit place for his body in this splendid and noble country, wishes to be buried in the land of Canaan. Therefore, in order that Joseph might more freely dare to ask, and might more easily obtain, this favor from the king, Jacob binds him by an oath. And certainly Joseph afterwards makes use of this pretext, to avoid giving offense. This also was the reason why he required Joseph to do for him that last office, which was a duty devolving on the brothers in common; for such a favor would scarcely have been granted to the rest; and they would not have ventured on the act, unless permission had been obtained. But, as strangers and mean men, they had neither favor nor authority. Besides, it was especially necessary for Joseph to be on his guard, lest becoming ensnared by the allurements of Egypt, he should gradually forsake his own kindred. It must, however, be known, that the solemnity of an oath was designedly interposed by Jacob, to show that he did not, in vain, desire for himself, a sepulcher in the land where he had met with an unfavorable reception; where he had endured many sufferings; and from which, at length, being expelled by hunger, he had become an exile. As to his commanding the hand to be put under his thigh, we have explained what this symbol means in Genesis 24:2