הֵן֩ גֵּרַ֨שְׁתָּ אֹתִ֜י הַיּ֗וֹם מֵעַל֙ פְּנֵ֣י הָֽאֲדָמָ֔ה וּמִפָּנֶ֖יךָ אֶסָּתֵ֑ר וְהָיִ֜יתִי נָ֤ע וָנָד֙ בָּאָ֔רֶץ וְהָיָ֥ה כָל־מֹצְאִ֖י יַֽהַרְגֵֽנִי׃
Behold, Thou hast driven me out this day from the face of the land; and from Thy face shall I be hid; and I shall be a fugitive and a wanderer in the earth; and it will come to pass, that whosoever findeth me will slay me.’
Sforno on Genesis
והיה כל מוצאי יהרגני, the fact that anyone who finds me is legally entitled to kill me makes my punishment much more severe than You, G’d, have told me.
Radak on Genesis
הן גרשת אותי...מעל פני האדמה, a reference to the soil of Eden, near the garden, where his father and mother had taken up residence. This is what the Torah had meant with the words לעבוד את האדמה אשר לקח משם, “to work the soil from which he had originally been taken.” (3,23)