# he lifted up his eyes
This means "he looked up." (See: [[rc://en/ta/man/translate/figs-idiom]])
# his mother's son, and he said
This can be translated with a new sentence. AT: "his mother's son. Joseph said"
# Is this your youngest brother ... me?
Possible meanings are 1) Joseph is truly asking a question to confirm that this man is Benjamin, or 2) it is a rhetorical question. AT: "So this is your youngest brother ... me." (See: [[rc://en/ta/man/translate/figs-rquestion]])
# my son
This is a friendly way one man speaks to another man of lower rank. AT: "young man"