Surah Al-Hashr 59:12

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

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.

Translation: Saheeh International

Tafsir

For indeed if they are expelled they would not go forth with them and if they are fought against they would not help them. And even if they were to help them that is to say even if they came to help them they would surely turn their backs to flee the implied response to the oath suffices in place of the response to …

Excerpt from Tafsir al-Jalalayn, commentary on 59:12, via Quran.com. The reader has the full commentary and 9 more tafsirs.