Jesus was not officially a rabbi, but his disciples, many other people, and even a member of the Sanhedrin, Nicodemus, called him Rabbi, which means teacher. His mastery of the OT was phenomenal. In the Gospels 104 times (including parallels), he quoted OT scriptures from 19 different books. He quoted from eight Psalms, using them in different ways.  1. Declaring His identity: Psalm 8:2 / Matthew 21:16, Psalm 118:22, 23 / Matthew 21:42, Mark 12:40, Luke 20:17, and Psalm 110:1 / Matthew 22:44, Mark 12:36 and 14:62, Luke 20:42 and 22:69.  2. Prophetic fulfillment: Psalm 82:6 / John 10:34, Psalm 41:9 / John 13:18 and Psalm 69:4 / John 15:25. 3. Talking to His Father from the cross:  Psalm 22:1 / Mark 15:34 and Psalm 31:5 / Luke 23:46.