Al-Hashr - 59:12

لَئِنْ أُخْرِجُوا لَا يَخْرُجُونَ مَعَهُمْ وَلَئِن قُوتِلُوا لَا يَنصُرُونَهُمْ وَلَئِن نَّصَرُوهُمْ لَيُوَلُّنَّ الْأَدْبَارَ ثُمَّ لَا يُنصَرُونَ
[59:12]
Certainly if these are driven forth, they will not go forth with them, and if they are fought against, they will not help them, and even if they help-them, they will certainly turn (their) backs, then they shall not be helped.
If they are expelled, never will they go out with them; and if they are attacked (in fight), they will never help them; and if they do help them, they will turn their backs; so they will receive no help.
(For) indeed if they are driven out they go not out with them, and indeed if they are attacked they help them not, and indeed if they had helped them they would have turned and fled, and then they would not have been victorious.