Word by Word Analysis

لَئِنْ أُخْرِجُوا۟ لَا يَخْرُجُونَ مَعَهُمْ وَلَئِن قُوتِلُوا۟ لَا يَنصُرُونَهُمْ وَلَئِن نَّصَرُوهُمْ لَيُوَلُّنَّ ٱلْأَدْبَـٰرَ ثُمَّ لَا يُنصَرُونَ 12

If they are expelled, they will not leave with them, and if they are fought, they will not aid them. And [even] if they should aid them, they will surely turn their backs; then [thereafter] they will not be aided.