What does 2 Kings 13:17 mean?

Then Elisha said, 'Take the arrows.' Jehoash took them. Elisha told him, 'Strike the ground.' Jehoash struck the ground three times and stopped. 2 Kings 13:17 - Modern Text Bible

(Elisha gives Jehoash another symbolic action, but Jehoash only does it three times, showing a lack of full commitment or understanding.)