Verse 20

يَحْسَبُونَ ٱلْأَحْزَابَ لَمْ يَذْهَبُوا۟ وَإِن يَأْتِ ٱلْأَحْزَابُ يَوَدُّوا۟ لَوْ أَنَّهُم بَادُونَ فِى ٱلْأَعْرَابِ يَسْـَٔلُونَ عَنْ أَنۢبَآئِكُمْ وَلَوْ كَانُوا۟ فِيكُم مَّا قَـٰتَلُوٓا۟ إِلَّا قَلِيلًا

The parties thought they would never leave, and if the parties had come they would have still loved to join camps with the Arabs; they ask of the news about you, and if they were with you, they would have not fought except occasionally.