Genesis 42:13
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. 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.
The words are the brothers' answer to the Egyptian ruler, who is Joseph, after he accuses them of being spies, as they insist that their only errand in Egypt is to buy food. They state that they are twelve brethren, the sons of one man in the land of Canaan, with the youngest still with their father and one brother gone. The youngest with the father is Benjamin remaining at home, while the one who is gone is the family's loss of Joseph, presumed lost. They answer humbled by adversity, showing grief rather than anger at the suspicion against them.
Their answer gives Joseph the information about his family and home that he most wants to learn, namely news of his father Jacob and of Benjamin. Joseph repeats the spy charge to test whether the brothers still have the same haughty spirit they had when he lived with them and whether they have changed. Professing to doubt their story, he requires that they not leave Egypt until their youngest brother is brought there to prove whether their words are true.