Commentary on the Torah of Rabbi Hezekiah ben Manoah. Chizkuni, composed in mid-13th century, is actually a compilation of insights culled from the Midrashim, as well as the writings of twenty other Rishonim, including Rashi, Rashbam and Ibn Ezra. However, Chizkuni does not name any of his sources (other than Rashi), in order to encourage objective study, as he felt that one should focus on the message rather than the messenger.