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22Then you shall say to Pharaoh, ‘This is what the Lord says: “Israel is My son, My firstborn. 23So I said to you, ‘Let My son go so that he may serve Me’; but you have refused to let him go. Behold, I am going to kill your son, your firstborn.” ’ ”
24But it came about at the overnight encampment on the way, that the Lord met Moses, and sought to put him to death. 25So Zipporah took a flint and cut off her son’s foreskin and threw it at Moses’ feet; and she said, “You are indeed a groom of blood to me!” 26So He left him alone. At that time she said, “You are a groom of blood”—because of the circumcision.