C. F. Keil and Franz Delitzsch on Genesis 43:27-29

Gen 43:27-29

Joseph first of all inquired after their own and their father’s health (שׁלום first as substantive, then as adjective = שׁלם Gen 33:18), whether he was still living; which they answered with thanks in the affirmative, making the deepest bow. His eyes then fell upon Benjamin, the brother by his own mother, and he asked whether this was their youngest brother; but without waiting for their reply, he exclaimed, “God be gracious to thee, my son!” יחנך for יחנך as in Isa 30:19 (cf. Ewald, §251 d). He addressed him as “my son,” in tender and, as it were, paternal affection, and with special regard to his youth. Benjamin was 16 years younger than Joseph, and was quite an infant when Joseph was sold.