Reference for Proverbs 23:12

הָבִ֣יאָה לַמּוּסָ֣ר לִבֶּ֑ךָ וְ֝אָזְנֶ֗ךָ לְאִמְרֵי־דָֽעַת׃

Apply thy heart unto instruction, And thine ears to the words of knowledge.