The short answer
To see whether they had changed, though Genesis never says so outright. The tests, calling them spies, holding Simeon, returning their silver, demanding Benjamin and hiding a cup in his sack, recreate the day they sold him, with a favored son of Rachel at their mercy. Judah’s offer to stay as a slave in Benjamin’s place gives the answer.
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Why they did not know him
When ten brothers bow before Egypt’s governor, “Joseph recognized his brothers, but they didn’t recognize him” (Genesis 42:8). It is not hard to see why. They had last seen a boy of seventeen. Now, some twenty years on, they face a shaved Egyptian lord with an Egyptian name, who speaks to them through an interpreter (42:23). And as far as they knew, their brother was gone: “one is no more” (42:13). They, bearded shepherds from Canaan, looked as they always had.
The test, step by step
Joseph himself uses the word: “By this you shall be tested” (42:15). The steps:
- Spies. He accuses them of scouting Egypt’s weak points and locks them up for three days (42:9–17).
- A hostage. He keeps Simeon, binding him before their eyes, and sends the rest home with grain (42:24).
- The silver. Their payment turns up in their sacks. “What is this that God has done to us?” (42:28).
- Benjamin. They may not come back without their youngest brother. Jacob refuses until Judah makes himself answerable for the boy (43:8–9).
- The feast. He seats them in birth order, to their amazement, and serves Benjamin five times as much as anyone (43:33–34). Will they resent a favorite again?
- The cup. His silver cup is hidden in Benjamin’s sack. The terms are clear: the guilty one stays as a slave, and the rest may “go up in peace” to their father (44:17).
Step six is the old crime staged again. A son of Rachel, his father’s favorite, can vanish into Egypt, and the brothers can walk home with clean hands and a good excuse. Why Simeon in step two? The text does not say. Joseph has just heard Reuben, the eldest, recall that he tried to save him, and Simeon is next in line; Jewish tradition, through Rashi, adds that Simeon was the one who threw Joseph into the pit.
What Joseph overheard
The first sign comes early, spoken in Hebrew in front of a man they think cannot follow it:
They said to one another, “We are certainly guilty concerning our brother, in that we saw the distress of his soul, when he begged us, and we wouldn’t listen. Therefore this distress has come upon us.”
Joseph turns away and weeps. Chapter 37 never told us that Joseph begged from the pit. We learn it here, twenty years late, from his brothers’ guilty memory.
The decisive sign is Judah. He tells the governor the whole family story and even repeats his father’s hurtful line, “my wife bore me two sons” (44:27), as if Leah’s sons did not count. Judah no longer resents it. He only wants to spare the old man. Then he offers himself:
Now therefore, please let your servant stay instead of the boy, my lord’s slave; and let the boy go up with his brothers.
Judah once proposed selling a brother into slavery. Now he volunteers to become a slave himself.
A test, or something more?
Readers disagree about Joseph here. Some hear revenge in his rough words, or a wounded man not yet ready to trust. Others see a careful test of repentance. The medieval Jewish thinker Maimonides defined complete repentance as facing the same situation again, with the same chance to sin, and not doing it; many readers find that definition acted out by Judah in Egypt. Either way, the test ends when Joseph can no longer hold back (see did Joseph forgive his brothers?).
Sources
- Genesis 42:1–45:3
- Rashi on Genesis 42:24
- Maimonides, Mishneh Torah, Laws of Repentance 2:1
Bible quotations are from the World English Bible, which is in the public domain.