A messenger arrives to inform Jehu that the severed heads of the royal sons have been delivered. In response, Jehu commands that they be arranged in heaps at the entrance of the city gate. The envoy in this account is simply a standard messenger bringing the news [ביאור שטיינזלץ]. Jehu orders the heads to be gathered into distinct piles, much like a collected mound of stones or the great heaps of grain Joseph amassed in Egypt [רש״י, מצודת ציון, רד״ק, ביאור שטיינזלץ].
The specific instruction to divide the heads into exactly two piles carries a deeper symbolic meaning. It serves as a direct reference to Ahab and Jezebel, the parents of the slain princes. Their shared wickedness produced corrupt children who ultimately met a violent end. The two separate heaps physically represent the sins of these two parents, whose evil actions brought disaster upon their own offspring [חומת אנך].
Leaving these piles at the city gate until the morning is a calculated decision meant for public display. Placed in such a prominent location, the heads remain in plain sight, ensuring that the people fully witness the event [מצודת דוד].