Matthew Poole and continuators on Genesis 50:5

5 My father made me swear , saying, Lo, I die: in my grave, which I have digged for me , in the land of Canaan, there shalt thou bury me. Now therefore let me go up, I pray thee, and bury my father, and I will come again.

Here is triple obligation upon Ioseph, 1. His duty to fulfil the will of the dead. 2. The obedience which he owed to his Fathers command. 3. The tye of a solemn Oath. All which had weight even with the Heathens, and were so many arguments to Pharaoh and his Courtiers,

According to the manner of those antient and succeeding times. See 2 Chron. 16. 14. Isa. 22. 16. Matth. 27. 60. In that large cave which Abraham bought for a burying place for his Family, Iacob had digged a particular and small cell or repository for himself, as others did after him upon the like occasion. And this reason is prudently added, to shew that this desire proceeded not from any contempt of Pharaoh or his Land, but from that common and customary desire of persons of all ages and Nations, to be buried in their Fathers Sepulchres.

Marginal references: chap. 47. 29.