Surah Al-Fath Verse 16 - English Translation by A. J. Arberry
Surah Al-Fathقُل لِّلۡمُخَلَّفِينَ مِنَ ٱلۡأَعۡرَابِ سَتُدۡعَوۡنَ إِلَىٰ قَوۡمٍ أُوْلِي بَأۡسٖ شَدِيدٖ تُقَٰتِلُونَهُمۡ أَوۡ يُسۡلِمُونَۖ فَإِن تُطِيعُواْ يُؤۡتِكُمُ ٱللَّهُ أَجۡرًا حَسَنٗاۖ وَإِن تَتَوَلَّوۡاْ كَمَا تَوَلَّيۡتُم مِّن قَبۡلُ يُعَذِّبۡكُمۡ عَذَابًا أَلِيمٗا
Say to the Bedouins who were left behind: 'You shall be called against a people possessed of great might' to fight them, or they surrender. If you obey, God will give you a goodly wage; but if you turn your backs, as you turned your backs before, He will chastise you with a painful chastisement