Jacob's first and last, and grand resource was this. He had found the sweet effects of it before: Genesis 32:9-12 with Genesis 33:4.
Related Commentaries of Genesis 43:12
Genesis 43:12-14
12 And take double money in your hand; and the money that was brought again in the mouth of your sacks, carry it again in your hand; peradventure it was an oversight:
13 Take also your brother, and arise, go again unto the man:
14 And God Almighty give you mercy before the man, that he may send away your other brother, and Benjamin. Ifb I be bereaved of my children, I am bereaved.