וַיָּבֹ֙אוּ֙ בְּנֵ֣י יִשְׂרָאֵ֔ל לִשְׁבֹּ֖ר בְּת֣וֹךְ הַבָּאִ֑ים כִּֽי־הָיָ֥ה הָרָעָ֖ב בְּאֶ֥רֶץ כְּנָֽעַן׃
Y vinieron los hijos de Israel á comprar entre los que venían: porque había hambre en la tierra de Canaán.
Rashi
בתוך הבאים AMONG THOSE THAT CAME — They hid themselves in the crowd that people should not recognize them, for their father had bidden them not to show themselves all at one entrance to the city but that each should enter by a different gate in order that the evil eye should not have power over them (i.e. that they should not attract the envious attention of the people) for they were all handsome and stalwart men (Midrash Tanchuma 1.:10:6).
Chizkuni
בתוך הבאים, “they intermingled with others going to Egypt for the same purpose, disguising themselves so as not to draw attention to themselves as they had been commanded to do by their father, when he had said: למה תתראו, “why do you draw attention to yourselves?”
Sforno
בתוך הבאים, people traveled together in large groups to afford themselves protection against highway robbers. At that time there were more than the usual amount of these. They would rob both the money carried to buy food and the food itself