Genesis 42:4

4 except for Binyamin, Yosef's brother. Ya'akov did not send him with his brothers, because he was afraid something might happen to him.

Genesis 42:4 Meaning and Commentary

Genesis 42:4

But Benjamin, Joseph's brother, Jacob sent not with his
brethren
Benjamin is called Joseph's brother, because he was so both by father and mother's side, as the rest were not; him Jacob kept with him, being the youngest and his darling, the only son he had with him of his beloved wife Rachel; and was very probably the more beloved by him since he had been bereft of Joseph; and it was not only to keep him company that he retained him at home, but for the reason following: for he said, lest peradventure mischief befall him;
as had to Joseph his brother, as he imagined; either that the journey would be too much for him, being young, or lest he should be seized with sickness on the road, or rather with death, as Aben Ezra interprets it according to the Targums of Onkelos and Jonathan.

Genesis 42:4 In-Context

2 Look," he said, "I've heard that there's grain in Egypt. Go down there and buy some for us from there, so that we can stay alive and not die!"

3 Thus Yosef's ten brothers went down to buy grain from Egypt,

4 except for Binyamin, Yosef's brother. Ya'akov did not send him with his brothers, because he was afraid something might happen to him.

5 The sons of Isra'el came to buy along with the others that came, since the famine extended to the land of Kena'an.

6 Yosef was governor over the land; it was he who sold to all the people of the land. Now when Yosef's brothers came and prostrated themselves before him on the ground,