The dispute of Ibrahim (peace be upon him) with his people: Lordship or Worship?

Question:
Was the dispute of Ibrahim (peace and blessings be upon him) with his people regarding the oneness of lordship or the oneness of worship?

Answer:
It was regarding the oneness of worship. The messengers came to establish the oneness of worship, whereas the oneness of lordship is acknowledged by people of sound mind. His debate with them was a way of refuting them. He said, "You believe that these celestial bodies are gods, yet they all undergo change. The star sets, the moon sets, and the sun sets. If they were gods, they would not have set or disappeared. The fact that they are manipulated and moved is proof that they are created." He wanted to invalidate their belief because they used to worship the celestial bodies. Or he wanted to invalidate this belief and say that these celestial bodies are directed and managed; they rise from the east and set in the west.