Bereshit 42:3

וירדו אחי יוסף AND JOSEPH S BRETHREN WENT DOWN — It does not call them “the sons of Jacob” (as in 5:5), thus suggesting that they regretted having sold him and that they had made up their mind to behave towards him in a brotherly manner and to redeem him at whatever price people might fix for them to pay (Midrash Tanchuma, Miketz 8). עשרה TEN — What is the mention of this number intended to tell us? Is it not written (Genesis 42:4) “but Benjamin, Joseph’s brother did he not send” (and we therefore know that only ten brothers went to Egypt)? But it means to suggest that so far as their feeling of brotherhood towards Joseph was concerned they were divided into ten, because the love and hatred that all of them bore him were not alike, where as in regard to buying corn they were at one and united (Genesis Rabbah 91:2).

And Yosef’s ten brothers went down to buy corn in Miżrayim.

וַיֵּרְד֥וּ אֲחֵֽי־יוֹסֵ֖ף עֲשָׂרָ֑ה לִשְׁבֹּ֥ר בָּ֖ר מִמִּצְרָֽיִם׃