لَّمْ تُؤْمِنُوا۟ وَلَـٰكِن قُولُوٓا۟ أَسْلَمْنَا وَلَمَّا يَدْخُلِ ٱلْإِيمَـٰنُ فِى قُلُوبِكُمْ
“[O Bedouins,] you are not yet mu'mins (believers), you are Muslims (one who has accepted Islam). Iman has not yet fully entered your hearts.”
Opens the same passage as Al-Hujurat 49:17 (already linked to this event), addressing Bedouin tribes who overstated their faith upon accepting Islam without a fight.