A prophetic act is not merely a gesture; it is a direct reflection of the future battlefield, where a king's physical actions determine the fate of an entire war. The prophet Elisha is deeply angry with Joash, the king of Israel, because of his limited action with the arrows [ביאור שטיינזלץ]. The primary approach among commentators is that a direct symbolic link exists between the number of times the king struck the arrows and his upcoming military victories. Because Elisha had previously placed his hands over the king's hands as he held the bow, the physical action was transformed into a powerful sign of salvation [רש״י]. Each strike represented a distinct blow that would defeat the nation of Aram in battle [ביאור שטיינזלץ].
The expectation was for the king to strike five or six times [רש״י, מצודת דוד, ביאור שטיינזלץ]. Had he possessed the mindset to do so, the outcome of the war would have been vastly different [רד״ק]. Continuing to strike five or six times would have guaranteed an absolute victory, completely destroying the Aramean threat [מצודת דוד]. However, because the king stopped after merely three strikes, his future success was permanently limited to exactly three victories.
Alongside this symbolic explanation, another perspective views the prophet's anger through a distinctly spiritual lens. While the king was striking the arrows, Elisha was actively directing deep spiritual intentions necessary to bring about the destruction of Aram. When the king suddenly halted after three strikes, he broke the sequence of the action, directly interrupting the prophet and preventing him from completing his spiritual focus. This abrupt disruption of profound spiritual energy is the exact reason for the man of God's anger [חומת אנך].