"And we will worship and return to you" (Genesis 22:5). He prophesied that the two of them would return. Ten people prophesied and did not know what they prophesied, and these are they:
One: Abraham prophesied and did not know, as it is said, "And we will worship and return" — he prophesied that he and his son were destined to return.
Two: Jacob prophesied and did not know what he prophesied, as it is said, "And may He send back to you your other brother" (Genesis 43:14) — "your brother," this is Simeon; "the other," this is Joseph; "and Benjamin" (ibid.), as its plain meaning.
Three: Laban prophesied and did not know what he prophesied, as it is said, "And they blessed Rebekah" (Genesis 24:60) — they were found to be cursing themselves and blessing Rebekah.
Four: the tribes prophesied and did not know what they prophesied, as it is said, "and behold, the youngest is with our father this day" (Genesis 42:13) — they prophesied that Joseph was standing among them.
Five: Joseph prophesied and did not know what he prophesied, as it is said, "and let not your eye spare your vessels" — he prophesied that they were destined to plunder Egypt.
Six: Pharaoh prophesied and did not know what he prophesied, as it is said, "Come, let us deal wisely" (Exodus 1:10) — he prophesied that they would make war with him and go up from the land.
Seven: Job prophesied and did not know what he prophesied, as it is said, "shall we also receive the good?" (Job 2:10) — he prophesied that the Holy One, blessed be He, was destined to restore to him all the good.
Eight: our forefathers prophesied and did not know what they prophesied, as it is said, "You will bring them in and plant them" (Exodus 15:17) — they prophesied that their children were destined to enter the land while they themselves would not enter.
Nine: Gehazi prophesied and did not know what he prophesied, as it is said, "As the Lord lives, I will run after him and take from him something [me'umah]" (2 Kings 5:20) — "a blemish [mumah]," that is, leprosy; he prophesied concerning himself.
Ten: Hannah prophesied and did not know what she prophesied, as it is said, "and I also have lent him to the Lord all the days that he lives, he is lent to the Lord" (1 Samuel 1:28) — Hannah said, all the days that Samuel my son endures, the kingdom of Saul endures.