a Benjamin's portion
a Benjamin's portion (or mess)the largest share or portion.
In the Bible, Benjamin was the youngest son of the Jewish patriarch Jacob . When Jacob's sons encountered their long-lost brother Joseph in Egypt, where he had become a high official, they failed to recognize him, but Joseph generously entertained them: ‘And he took and sent messes [servings of food] unto them from before him: but Benjamin's mess was five times so much as any of their's’ (Genesis 43:34).
See also: portion