In Lesson 5 Notes Pg 6, The Lord's Holy Anger and Authoritative Action - 2. Response to the Lord's action. (According to notes: ) As the little band of disciples of stood with Him, they could not help thinking of Psalm 69:9 "Zeal for your house will consume me" which John quote (2:17) Psalm was always taken to refer to Messiah, in that when He came He would be burned up with zeal for the house of God.
My query : I looked up Psalms 69:9, it is written by David. Why does note say that it refers to Messiah ?