Or HaChaim on Genesis 43:23/אור החיים על בראשית מ״ג:כ״ג

1 שלום לכם, אל תיראו, "all is well with you, do not fear." Joseph's adjutant volunteered this statement without having consulted with his master first. According to Midrash Tanchuma on this verse Joseph's adjutant was his son Menashe, and we have an example here of the power of the son exceeding that of his father. Menashe was certain that his father would concur with his remarks. The reason Menashe added: "do not fear" was because he could see fear expressed on the brothers' faces. The Torah confirms this (verse 18) when it wrote: וייראו האנשים, "The men were afraid."

2נתן לכם מטמון. "He has given you a treasure." He meant that some person has hidden his money in your sacks and G'd has given it to you seeing the original owners have given up hope of retrieving it, and Gentiles are not required to make public announcements when they find something valuable. He led Shimon out to them in order to lift their spirits by proving his positive attitude towards them.