The Mark of Cain

(ג) וַֽיְהִ֖י מִקֵּ֣ץ יָמִ֑ים וַיָּבֵ֨א קַ֜יִן מִפְּרִ֧י הָֽאֲדָמָ֛ה מִנְחָ֖ה לַֽה'׃ (ד) וְהֶ֨בֶל הֵבִ֥יא גַם־ה֛וּא מִבְּכֹר֥וֹת צֹאנ֖וֹ וּמֵֽחֶלְבֵהֶ֑ן וַיִּ֣שַׁע ה' אֶל־הֶ֖בֶל וְאֶל־מִנְחָתֽוֹ׃ (ה) וְאֶל־קַ֥יִן וְאֶל־מִנְחָת֖וֹ לֹ֣א שָׁעָ֑ה וַיִּ֤חַר לְקַ֙יִן֙ מְאֹ֔ד וַֽיִּפְּל֖וּ פָּנָֽיו׃ (ו) וַיֹּ֥אמֶר ה' אֶל־קָ֑יִן לָ֚מָּה חָ֣רָה לָ֔ךְ וְלָ֖מָּה נָפְל֥וּ פָנֶֽיךָ׃ (ז) הֲל֤וֹא אִם־תֵּיטִיב֙ שְׂאֵ֔ת וְאִם֙ לֹ֣א תֵיטִ֔יב לַפֶּ֖תַח חַטָּ֣את רֹבֵ֑ץ וְאֵלֶ֙יךָ֙ תְּשׁ֣וּקָת֔וֹ וְאַתָּ֖ה תִּמְשׇׁל־בּֽוֹ׃ (ח) וַיֹּ֥אמֶר קַ֖יִן אֶל־הֶ֣בֶל אָחִ֑יו וַֽיְהִי֙ בִּהְיוֹתָ֣ם בַּשָּׂדֶ֔ה וַיָּ֥קׇם קַ֛יִן אֶל־הֶ֥בֶל אָחִ֖יו וַיַּהַרְגֵֽהוּ׃ (ט) וַיֹּ֤אמֶר ה' אֶל־קַ֔יִן אֵ֖י הֶ֣בֶל אָחִ֑יךָ וַיֹּ֙אמֶר֙ לֹ֣א יָדַ֔עְתִּי הֲשֹׁמֵ֥ר אָחִ֖י אָנֹֽכִי׃ (י) וַיֹּ֖אמֶר מֶ֣ה עָשִׂ֑יתָ ק֚וֹל דְּמֵ֣י אָחִ֔יךָ צֹעֲקִ֥ים אֵלַ֖י מִן־הָֽאֲדָמָֽה׃ (יא) וְעַתָּ֖ה אָר֣וּר אָ֑תָּה מִן־הָֽאֲדָמָה֙ אֲשֶׁ֣ר פָּצְתָ֣ה אֶת־פִּ֔יהָ לָקַ֛חַת אֶת־דְּמֵ֥י אָחִ֖יךָ מִיָּדֶֽךָ׃ (יב) כִּ֤י תַֽעֲבֹד֙ אֶת־הָ֣אֲדָמָ֔ה לֹֽא־תֹסֵ֥ף תֵּת־כֹּחָ֖הּ לָ֑ךְ נָ֥ע וָנָ֖ד תִּֽהְיֶ֥ה בָאָֽרֶץ׃ (יג) וַיֹּ֥אמֶר קַ֖יִן אֶל־ה' גָּד֥וֹל עֲוֺנִ֖י מִנְּשֹֽׂא׃ (יד) הֵן֩ גֵּרַ֨שְׁתָּ אֹתִ֜י הַיּ֗וֹם מֵעַל֙ פְּנֵ֣י הָֽאֲדָמָ֔ה וּמִפָּנֶ֖יךָ אֶסָּתֵ֑ר וְהָיִ֜יתִי נָ֤ע וָנָד֙ בָּאָ֔רֶץ וְהָיָ֥ה כׇל־מֹצְאִ֖י יַֽהַרְגֵֽנִי׃ (טו) וַיֹּ֧אמֶר ל֣וֹ ה' לָכֵן֙ כׇּל־הֹרֵ֣ג קַ֔יִן שִׁבְעָתַ֖יִם יֻקָּ֑ם וַיָּ֨שֶׂם ה' לְקַ֙יִן֙ א֔וֹת לְבִלְתִּ֥י הַכּוֹת־אֹת֖וֹ כׇּל־מֹצְאֽוֹ׃

(3) In the course of time, Cain brought an offering to ה' from the fruit of the soil; (4) and Abel, for his part, brought the choicest of the firstlings of his flock. ה' paid heed to Abel and his offering, (5) but to Cain and his offering [God] paid no heed. Cain was much distressed and his face fell. (6) And ה' said to Cain,
“Why are you distressed,
And why is your face fallen?
(7) Surely, if you do right,
There is uplift.
But if you do not do right
Sin couches at the door;
Its urge is toward you,
Yet you can be its master.”
(8) Cain said to his brother Abel … and when they were in the field, Cain set upon his brother Abel and killed him. (9) ה' said to Cain, “Where is your brother Abel?” And he said, “I do not know. Am I my brother’s keeper?” (10) “What have you done? Hark, your brother’s blood cries out to Me from the ground! (11) Therefore, you shall be more cursed than the ground, which opened its mouth to receive your brother’s blood from your hand. (12) If you till the soil, it shall no longer yield its strength to you. You shall become a ceaseless wanderer on earth.” (13) Cain said to ה', “My punishment is too great to bear! (14) Since You have banished me this day from the soil, and I must avoid Your presence and become a restless wanderer on earth—anyone who meets me may kill me!” (15) ה' said to him, “I promise, if anyone kills Cain, sevenfold vengeance shall be exacted.” And ה' put a mark on Cain, lest anyone who met him should kill him.
עוני מנשוא. בִּתְמִיהָ, אַתָּה טוֹעֵן עֶלְיוֹנִים וְתַחְתּוֹנִים, וַעֲוֹנִי אִי אֶפְשָׁר לִטְעֹן? (בראשית רבה)
גדול עוני מנשוא MY PUNISHMENT IS GREATER THAN I CAN BEAR (literally, my sin is greater than what can be borne) — This is a question: You bear the worlds above and below. and is it impossible for You to bear my sin? (Genesis Rabbah 22:11).
וישם ה' לקין אות. חָקַק לוֹ אוֹת מִשְּׁמוֹ בְּמִצְחוֹ. ס"א דָּבָר אַחֵר, כָּל מוֹצְאִי יַהַרְגֵנִי, הַבְּהֵמוֹת וְהַחַיּוֹת, אֲבָל בְּנֵי אָדָם עֲדַיִן לֹא הָיוּ שֶׁיִּירָא מֵהֶם, רַק אָבִיו וְאִמּוֹ, וּמֵהֶם לֹא הָיָה יָרֵא שֶׁיַּהַרְגוּהוּ, אֶלָּא אָמַר עַד עַכְשָׁו הָיָה פַּחְדָּתִי עַל כָּל הַחַיּוֹת כְּמֹ"שֶׁ וּמוֹרַאֲכֶם וְגוֹ', וְעַכְשָׁו בִּשְׁבִיל עָוֹן זֶה לֹא יִירְאוּ מִמֶּנִּי הַחַיּוֹת וְיַהַרְגוּנִי, מִיָּד וַיָּשֶׂם ה' לְקַיִן אוֹת – הֶחֱזִיר אֶת מוֹרָאוֹ עַל הַחַיּוֹת:
וישם ה' לקין אות AND THE LORD SET A SIGN FOR CAIN — He inscribed on his forehead a letter of His Divine Name (Pirkei DeRabbi Eliezer 21). Other editions of Rashi add the following: another interpretation of “Whoever will find me will slay me”: this refers to cattle and beasts, since there were then no human beings in the world of whom he might be afraid except his father and mother, and, of course, he did not fear that they would slay him. He, therefore, said, “Until now the fear of me was upon all animals — as it is written”, (Genesis 9:2) “And the fear of you shall be upon all beasts of the field” etc. — now, however, because of my sin the animals will no longer fear me and will kill me. God immediately set a sign for Cain, viz., he again made the animals be in fear of him.
וא"ר יהודה בריה דרבי חייא גלות מכפרת עון מחצה מעיקרא כתיב (בראשית ד, יד) והייתי נע ונד ולבסוף כתיב (בראשית ד, טז) וישב בארץ נוד
And Rav Yehuda, son of Rabbi Ḥiyya, says: Exile atones for half of a sin. As initially it is written in the verse concerning Cain that he said: “And I shall be a fugitive [na] and a wanderer [vanad ] in the earth” (Genesis 4:14), and ultimately it is written: “And Cain went out from the presence of the Lord, and dwelt in the land of Nod” (Genesis 4:16). Rav Yehuda, son of Rabbi Ḥiyya, equates “Nod” with “nad,” and understands that Cain was given only the punishment of being a wanderer. Exile atoned for half his sin, thereby negating the punishment of being a fugitive.