وَمَن لَّمْ يُؤْمِن بِاللَّهِ وَرَسُولِهِ فَإِنَّا أَعْتَدْنَا لِلْكَافِرِينَ سَعِيرًا
“And whoever does not believe in Allah and His Messenger, then We surely have prepared for the disbelievers a blazing Fire.”
This ayah is part of Surah al-Fath, revealed -- as this event's own significance note states -- "concerning this incident" (Q48:1), the Treaty of Hudaybiyyah.