John Calvin Commentary Genesis 50:25

"And Joseph took an oath of the children of Israel, saying, God will surely visit you, and ye shall carry up my bones from hence." — Genesis 50:25 (ASV)

God will surely visit you. By these words Joseph implies that they would be buried as if forgotten as long as they remained in Egypt; and truly, that exile was as if God had turned his back on them for a time. Nevertheless, Joseph does not cease to fix the eyes of his mind on God, as it is written in the Prophet:

I will wait upon the Lord that hideth his face from the house of Jacob (Isaiah 8:17).

This passage also clearly teaches what was the purpose of his anxious choice of burial place: namely, that it might be a seal of redemption: for after he has asserted that God was faithful and would, in his own time, grant what he had promised, he immediately adjures his brethren to carry away his bones.

These were useful relics. Their sight plainly signified that the eternal covenant, in which Joseph commands his descendants to rest securely, had by no means become extinct through the death of men. For he considers it sufficient to cite the oath of God to remove all their doubts concerning their deliverance.

End of the Commentaries on the first book of Moses called Genesis.