And they said, Thy servants are twelve brethren, the sons of one man in the land of Canaan; and, behold, the youngest is this day with our father, and one is not. One is not - An elliptical sentence, One is not alive.
Related Commentaries of Genesis 42:13
Genesis 42:13
13 And they said, Thy servants are twelve brethren, the sons of one man in the land of Canaan; and, behold, the youngest is this day with our father, and one is not.