قُلْ هَلْ تَرَبَّصُونَ بِنَا إِلَّا إِحْدَى الْحُسْنَيَيْنِ ۖ وَنَحْنُ نَتَرَبَّصُ بِكُمْ أَن يُصِيبَكُمُ اللَّهُ بِعَذَابٍ مِّنْ عِندِهِ أَوْ بِأَيْدِينَا ۖ فَتَرَبَّصُوا إِنَّا مَعَكُم مُّتَرَبِّصُونَ
“Say, "Are you awaiting anything to befall us except one of the two best things: [victory or martyrdom]? But We are awaiting Allah to afflict you with torment either from Him or at our hands. So keep waiting! We too are waiting with you."”
Part of the well-established hypocrites-who-stayed-behind-from-Tabuk passage of Surat al-Tawbah.