وَلَآ أَنتُمْ عَـٰبِدُونَ مَآ أَعْبُدُ
“nor do you worship what I worship.”
This ayah is part of Surah al-Kafirun, revealed -- as this event's own description states -- in response to the Quraysh's offer to alternate worship, rejecting any compromise in tawhid.