Genesis 42:8

“And Joseph knew his brethren, but they knew not him.] It being about twenty two years since they saw him, and then he was young, and his beard not grown, as now it was; and besides, he was clothed as a prince, and spoke the Egyptian language; and being in such great grandeur and splendour, and in such power and authority, and having such a retinue attending him, they never once thought of him, whom they supposed might be dead, having never heard of him all this time; or, however, it could not come into their minds, that he whom they sold for a slave could ever be governor of the land of Egypt.”

“- Joseph and Ten of His Brethren 1. שׁבר sheber, “fragment, crumb, hence, grain.” בר bar “pure,” “winnowed,” hence, “corn” (grain). 6. שׁליט shallı̂yṭ, “ruler, governor, hence,” Sultan. Not elsewhere found in the Pentateuch. 25. כלי kelı̂y, “vessel,” here any portable article in which grain may be conveyed. שׂק śaq, “sack,” the very word which remains in our language to this day. אמתחת 'amtachath “bag.” Twenty years, the period of Joseph’s long and anxious waiting, have come to an end. The dreams of his boyhood are now at length to be fulfilled. The famine has reached the chosen family, and they look at one another perplexed and irresolute, not knowing what to do. Genesis 42:1-5 The aged…”

“42:8 they didn’t recognize him: Joseph was a grown man, not a boy. He was not wearing a beard, was dressed in Egyptian clothes, and was in an unexpected position, speaking to them through an interpreter (42:23).”