Page "Amram" Paragraph 8

Despite the legend of his divorce and remarriage, Amram was also held to have been entirely sinless throughout his life, and was rewarded for this by his corpse remaining without any signs of decay.

Prior to his death, according to the Book of Jubilees, Amram was among those who went to Egypt and recovered the bones of the sons of his grandfather and great uncles ( excluding those of Joseph which had already been brought to Canaan ), so that they could be reburied in the cave of Machpelah.

The text states that this recovery was opportunistically performed when a war broke out between Egypt and Canaan.