(יג) וַיֵּצֵא קַיִן מִלִּפְנֵי ה' (בראשית ד, טז), מֵהֵיכָן יָצָא, רַבִּי יוּדָן בְּשֵׁם רַבִּי אַיְבוּ אָמַר הִפְשִׁיל דְּבָרִים לַאֲחוֹרָיו וְיָצָא, כְּגוֹנֵב דַּעַת הָעֶלְיוֹנָה. רַבִּי בֶּרֶכְיָה בְּשֵׁם רַבִּי אֶלְעָזָר בְּרַבִּי שִׁמְעוֹן אָמַר, יָצָא כְּמַפְרִיס וְכִמְרַמֶּה בְּבוֹרְאוֹ. רַבִּי חָמָא בְּשֵׁם רַבִּי חֲנִינָא בַּר רַבִּי יִצְחָק אָמַר, יָצָא שָׂמֵחַ, הֵיךְ מָה דְאַתְּ אָמַר (שמות ד, יד): הִנֵּה הוּא יֹצֵא לִקְרָאתֶךָ וגו', פָּגַע בּוֹ אָדָם הָרִאשׁוֹן אָמַר לוֹ מַה נַּעֲשָׂה בְּדִינְךָ, אָמַר לוֹ עָשִׂיתִי תְּשׁוּבָה וְנִתְפַּשַּׁרְתִּי. הִתְחִיל אָדָם הָרִאשׁוֹן מְטַפֵּחַ עַל פָּנָיו, אָמַר, כָּךְ הִיא כֹּחָהּ שֶׁל תְּשׁוּבָה וַאֲנִי לֹא הָיִיתִי יוֹדֵעַ, מִיָּד עָמַד אָדָם הָרִאשׁוֹן וְאָמַר (תהלים צב, א): מִזְמוֹר שִׁיר לְיוֹם הַשַּׁבָּת וגו'. אָמַר רַבִּי לֵוִי הַמִּזְמוֹר הַזֶּה אָדָם הָרִאשׁוֹן אֲמָרוֹ וְנִשְׁתַּכַּח מִדּוֹרוֹ וּבָא משֶׁה וְחִדְּשׁוֹ עַל שְׁמוֹ, מִזְמוֹר שִׁיר לְיוֹם הַשַּׁבָּת טוֹב לְהוֹדוֹת לַה' וגו'.
'And Kayin went out from the presence of Ad-nai' (Gen. 4:16) - from where did he go?! Rabbi Yudan in the name of Rabbi Ayvu said: he threw words behind him and went out, as one who could deceive the Highest Awareness. Rabbi Berachia in the name of Rabbi Eleazar son of Rabbi Shime'on said: he went out as one who shows the cloven hoof [a hypocrite] as one who deceives His Creator. Rabbi Chama in the name of Rabbi Chanina bar Rabbi Yitzchak said: he went out happy, as you read "behold he comes out to greet you [and when he sees you he'll be glad in his heart]" (Ex. 4:14). Adam met him and said: 'how did your judgement go?' and he answered: 'I repented [did teshuvah] and I am reconciled.' Adam began to hide his face [crying] and said: this is the power of teshuvah [repentance] and I did not know. Immediately Adam rose and said: 'A Psalm of Shabbat etc.' (Ps. 92) Said Rabbi Levi: this mizmor was said by the first Adam and it was forgotten in his generation, and came Moshe and renewed it under his name, 'it is a good thing to thank Ad-nai' (Ps. 92:1-2).