قُل لِّلْمُخَلَّفِينَ مِنَ ٱلْأَعْرَابِ سَتُدْعَوْنَ إِلَىٰ قَوْمٍ أُولِى بَأْسٍ شَدِيدٍ تُقَـٰتِلُونَهُمْ أَوْ يُسْلِمُونَ ۖ فَإِن تُطِيعُوا يُؤْتِكُمُ ٱللَّهُ أَجْرًا حَسَنًا ۖ وَإِن تَتَوَلَّوْا كَمَا تَوَلَّيْتُم مِّن قَبْلُ يُعَذِّبْكُمْ عَذَابًا أَلِيمًا

Qul lilmukhallafeena mina al-aAArabisatudAAawna ila qawmin olee ba/sin shadeedin tuqatiloonahumaw yuslimoona fa-in tuteeAAoo yu/tikumu Allahuajran hasanan wa-in tatawallaw kama tawallaytum minqablu yuAAaththibkum AAathaban aleema

Say to those who remained behind of the bedouins, "You will be called to [face] a people of great military might; you may fight them, or they will submit. So if you obey, Allāh will give you a good reward; but if you turn away as you turned away before, He will punish you with a painful punishment."