Sirach 52:2
My grandfather Jesus, after he gave himself fully to a diligent reading of the law, and the prophets, and the other books that were handed down to us by our ancestors, also wanted to write something himself, about the things that pertain to doctrine and wisdom, so that those who desire to learn and to become skillful in these things would be more and more attentive in mind, and would be strengthened to live according to the law