Whose sermons are quoted most in the Bible? The answer may surprise you. Deuteronomy is essentially a series of sermons by the greatest Old Testament prophet. Jesus himself quoted more from Deuteronomy than from any other portion of the Old Testament. Just as the New Testament epistles are our primary interpretive commentary on the historical narratives (the Gospels and Acts), the most venerated portion of the Old Testament - the Torah - has within it its primary commentary in the form of three sermons by Moses.