The law of replacement in the Quran
In Surat at-Tawbah, which was the last surah to be revealed and considered by most scholars to have been revealed in one go, Allah mentions the law of replacement, sunnat al-istibdaal (سُنَّةُ الاستبدال). یَـٰۤأَیُّهَا ٱلَّذِینَ ءَامَنُوا۟ مَا لَكُمۡ إِذَا قِیلَ لَكُمُ ٱنفِرُوا۟ فِی سَبِیلِ ٱللَّهِ ٱثَّاقَلۡتُمۡ إِلَى ٱلۡأَرۡضِۚ أَرَضِیتُم بِٱلۡحَیَوٰةِ ٱلدُّنۡیَا مِنَ ٱلۡـَٔاخِرَةِۚ فَمَا مَتَـٰعُ…