Genesis 42:20

20 Then you must bring your youngest brother to me. This will prove that you have been telling the truth, and I will not put you to death." They agreed to this

Genesis 42:20 Meaning and Commentary

Genesis 42:20

But bring your youngest brother unto me
Upon their return for more corn: so shall your words be verified;
that they were true men, and had no ill design upon the land, but were come only to buy corn: and ye shall not die;
as spies, which they were otherwise threatened with; and as it is customary in all nations to put such to death when found out: and they did so;
they left one of their brethren behind; they carried corn to their houses or families in Canaan, and brought their brother Benjamin with them when they returned to Egypt.

Genesis 42:20 In-Context

18 On the third day Joseph said to them, "I am a God-fearing man, and I will spare your lives on one condition.
19 To prove that you are honest, one of you will stay in the prison where you have been kept; the rest of you may go and take back to your starving families the grain that you have bought.
20 Then you must bring your youngest brother to me. This will prove that you have been telling the truth, and I will not put you to death." They agreed to this
21 and said to one another, "Yes, now we are suffering the consequences of what we did to our brother; we saw the great trouble he was in when he begged for help, but we would not listen. That is why we are in this trouble now."
22 Reuben said, "I told you not to harm the boy, but you wouldn't listen. And now we are being paid back for his death."
Scripture taken from the Good News Translation - Second Edition, Copyright 1992 by American Bible Society. Used by Permission.