Midrash su Geremia 9:25

(Exodus 18:3) "and her two sons … in a foreign land": R. Yehoshua says "foreign": as stated (i.e., literally). R. Elazar Homadai says: in a land of foreign (gods, i.e., idolatry). Moses said: Since the whole world serves idolatry, I will serve Him who spoke and brought the (whole) world into being. For when Moses said to Yithro, Give me your daughter Tzipporah as a wife, Yithro answered, If you do what I ask of you, I will give her to you as a wife. Moses: What do you ask? Yithro: Your first son must serve idolatry. Thenceforward, they may serve (G d) in heaven. Moses accepted. Yithro: Swear. And he swore, as it is written (Exodus 2:21) "Vayoel Moses, etc.", this being an expression for swearing, as in (I Samuel 14:24) "Vayoel Saul the people" (in context: "And Saul beswore the people.") And it is written (II Kings 5:3) "Hoel (in context: "Swear") and take two talents, etc." Therefore, the angel came forward to kill Moses (viz. Exodus 4:24), whereupon (Ibid. 25) "Tzipporah took a flint and cut off the foreskin of her son … (26) "And he (the angel) let go of him." R. Elazar b. Azaryah says: Repulsive is the foreskin, by which the wicked are demeaned, viz. (Jeremiah 9:25) "for all the nations are uncircumcised, and all the house of Israel is uncircumcised of heart." R. Yishmael says: Great is circumcision over which thirteen covenants was made. R. Yossi Haglili says: Great is circumcision, which overrides the Sabbath, which is liable to kareth (cutting-off). R. Yehoshua b. Karcha says: Great is circumcision, laxity in which did not permit all of Moses' merits to protect him for even a short time. R. Nechemiah says: Great is circumcision, which overrides (non-cutting of) plague-spots (viz. Devarim 24:8). Rebbi says: Great is circumcision, all of Moses' merits not standing for him in his duress. When the L rd told him "Take out My people, the children of Israel from the land of Egypt," because he was lax for a short time in (the) circumcision (of his son), the angel sought to kill him, viz. (Exodus 4:24) "and he was on the way in the lodging, etc." R. Yossi says: G d forbid that tzaddikim should be lax in circumcision for even a short while, but Moses expounded: Shall he circumcise (his son) and journey (to Egypt) — that would involve a risk of life (for the child.) Shall he wait and circumcise — the L rd has said to him: "Go and take My people Israel out of Egypt." But (his lapse was that) he preoccupied himself with his lodging before circumcising, wherefore the L rd sought to kill him, viz.: "And he was on the way in the lodging, etc." R. Shimon b. Gamliel says: The angel did not seek to kill Moses, but the child, viz. (Ibid. 25) "for you are a groom of blood to me." Who is called a "groom" (in this context), the child or Moses? The child.

(5) R' Yishmael and R' Akiva: R' Yishmael says, Avraham was a High Priest, as it says (Ps. 110:4), "The LORD has sworn and will not relent, 'You are a priest forever, etc.'" and it says elsewhere (Gen. 17:11), "You shall circumcise the flesh of your foreskin." From where should he be circumcised? If he is circumcised from the ear, he is not fit to offer sacrifices. From the mouth, he is not fit to offer sacrifices. From the heart, he is not fit to offer sacrifices. Where should he be circumcised so that he will be fit to offer sacrifices? You must say it is the foreskin of the body. R' Akiva says, there are four foreskins. Foreskin is said with regard to the ear (Jer. 6:10): "Their ears are blocked." Foreskin is said with regard to the mouth (Exod. 6:12): "me, a man of impeded lips." Foreskin is said with regard to the heart (Jer. 9:25): "but all the House of Israel are uncircumcised of heart." Foreskin is said with regard to the body (Gen. 17:14): "male who is uncircumcised [one who is uncircumcised in his maleness]." It was said to him, (Gen. 17:1): "Walk in My ways and be blameless/whole." If he is circumcised from the ear, he is not whole; from the mouth, he is not whole; from the heart, he is not whole. From where should he be circumcised so that he will be whole? You must say it is the foreskin of the body. Scripture says (Gen. 17:11-12), "[You shall circumcise the flesh of your foreskin, and that shall be the sign of the covenant between Me and you.] And throughout the generations, every male among you shall be circumcised at the age of eight days." If he is circumcised from the ear, he cannot hear; from the mouth, he cannot speak; from the heart, he cannot think. From where should he be circumcised so that he can think? This is the foreskin of the body. R' Tanhuma said, tis Scripture makes sense (Gen. 17:14): "male who is uncircumcised [one who is uncircumcised in his maleness]." And does there exist one who is uncircumcised in femaleness? Rather, from the place where it is recognized whether male or female -- from there we circumcise him.