## he lifted up his eyes ##

This means "He looked up." (See: [[rc://en/ta/man/translate/figs-idiom]])

## his mother's son, saying ##

This could be translated with a new sentence: "his mother's son. Joseph said."

## Is this your youngest brother... ##

Possible meanings are 1) "It is a rhetorical question with the alternate translation: 'So this is your youngest brother...'." 2) "Joseph sought confirmation that the man was indeed Benjamin, his brother."

## God be gracious ##

"May God be gracious"

## my son ##

This is a friendly way one man speaks to another man of lower rank.