In light of this it is significant that there is no clear instance of the casting out of demons in
“In light of this, it is significant that there is no clear instance of the casting out of demons in the Old Testament. The nearest analogy is the case of David playing the lyre for King Saul: “And whenever the evil spirit from God was upon Saul, David took the lyre and played it with his hand; so Saul was refreshed, and was well, and the evil spirit departed from him” (1 Sam. 16:23). However, Scripture speaks of this as a recurring event (“whenever”), indicating that the evil spirit returned after David left”
Grudem, Wayne A. Systematic Theology: An Introduction to Biblical Doctrine. Zondervan, 2009, loc. 504.
This is an interesting point. Demons were obviously very active in the Old Testament, yet many of the interactions with those demons were “earthly,” or physical in nature. Through music, or wars, or through pagan worship. There are some instances of prayer bringing angelic warriors into battle (Daniel 10:12-14)