Final answer:
Joseph commanded his steward to put a silver cup into Benjamin's sack, which was a test of his brothers' character in the biblical story from the Book of Genesis.
Step-by-step explanation:
In the biblical narrative of Joseph, found in the Book of Genesis, Joseph commanded his steward to put a silver cup into Benjamin's sack. This act was part of a test by Joseph to see if his brothers had changed since they sold him into slavery many years before.
When the silver cup was found, it provided Joseph with the leverage to bring his brothers back to him, thus leading to a dramatic revelation and eventually the reunification of Joseph with his father, Jacob, and his entire family.