"And God Almighty give you mercy before the man, that he may send away your other brother, and Benjamin. If I be bereaved of my children, I am bereaved." (Genesis 43: 14)
Jacob held out for a long time, until the famine was sore in the land of Canaan (Genesis 43: 1).
Joseph was already building up a strong nation in Egypt, one which would provide all things for His Covenant partner Jacob, his family, and eventually for the entire world.
For his family to receive the blessings, though, Jacob would have to release his Beloved son Benjamin.
"Benjamin" means "Son of my right hand" in Hebrew, a perfect picture of Jesus Christ, who is seated at the right hand of God the Father in full glory and majesty.
In another sense, Benjamin is a type of our limited understanding of Christ Jesus, as though He is not poweful enough to move in our lives. Because we do not trust, do not rest in the Finished Work of Jesus Christ, we feel compelled to depend on our resources in front of us, convinced that Jesus is just a little boy who can do nothing.
When we release the Son at His Right Hand in our lives, when we trust that in Him we receive all things, we are bringing every thought into captivity to the obedience of Christ (2 Corinthians 10: 5), who intercedes on our behalf at the right hand of the Father, our mediator in every way.
We no longer look to ourselves, as if we have only our resources.
We can trust that God is for us, and therefore no one else can be against us (Romans 8: 31-32)
When Jacob allowed his son Benjamin to go to Egypt, Joseph blessed every son mightily, and when they returned with more food, treasures, and favor, they reported that Joseph was still alive, and ready to receive his father.
Release all things to the Son, and let the Son save you in every situation.