4:9ד׳:ט׳
1 א

אי הבל אחיך. לְכָּנֵס עִמּוֹ בְּדִבְרֵי נַחַת, אוּלַי יָשׁוּב וְיֹאמַר: אֲנִי הֲרַגְתִּיו וְחָטָאתִי לְךָ:

איה הבל אחיך WHERE IS ABEL THY BROTHER — thus entering into a friendly conversation with him: perhaps he might repent and say, “I have killed him, and sinned against You” (Genesis Rabbah 19:11).

2 ב

לא ידעתי. נַעֲשָׂה כְּגוֹנֵב דַּעַת הָעֶלְיוֹנָה:

לא ידעתי I KNOW NOT — He became a deceiver of the Most High (i. e. he persuaded himself that he could deceive Him) (Numbers Rabbah 20:6).

3 ג

השומר אחי. לְשׁוֹן תֵּמַהּ הוּא, וְכֵן כָּל הֵ"א הַנְּקוּדָה בַּחֲטַף פַּתָּח:

השומר אחי אנכי AM I MY BROTHER’S KEEPER — This is a question. Similarly, wherever ‘ה has a חטף פתח it introduces a question.