אֲשֶׁ֨ר קֹנֵיהֶ֤ן יַֽהֲרְגֻן֙ וְלֹ֣א יֶאְשָׁ֔מוּ וּמֹכְרֵיהֶ֣ן יֹאמַ֔ר בָּר֥וּךְ יְהוָ֖ה וַאעְשִׁ֑ר וְרֹ֣עֵיהֶ֔ם לֹ֥א יַחְמ֖וֹל עֲלֵיהֶֽן׃
whose buyers slay them, and hold themselves not guilty; and they that sell them say: Blessed be the LORD, for I am rich; and their own shepherds pity them not.
Read midrashic interpretation of Zechariah 11:5: and classical rabbinic exegesis.