Sahih Ibn Khuzaymah

Sayyiduna Urwah bin Zubair narrates that during the caliphate of Sayyiduna Umar bin Khattab, Abdur Rahman bin Qari was the governor of the treasury along with Abdullah bin Arqam. (He narrates that) Sayyiduna Umar bin Khattab (may Allah be pleased with him) came out of his house one night in the blessed month of Ramadan, and Abdur Rahman bin Abdul Qari also walked with him. He made a round of the mosque, and the people of the mosque were praying in different groups; some people were praying alone, and some people were praying together with others. So Sayyiduna Umar (may Allah be pleased with him) said, "By Allah, I think that if we gather all of them behind one reciter, it would be very good." Then Sayyiduna Umar (may Allah be pleased with him) firmly resolved to do this. And he ordered Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) to lead them in the voluntary prayers during the blessed month of Ramadan. Then one day Sayyiduna Umar (may Allah be pleased with him) came to them while they were praying (nafl) with their reciter, so Sayyiduna Umar (may Allah be pleased with him) said, "How excellent is this new thing!" The part of the night in which you sleep is better than the part in which you are praying." He meant the last part of the night. So people used to stand in prayer in the early part of the night, and after the middle of Ramadan, they would curse the disbelievers (with these words) in the supplication of Qunoot: « اللّٰهُمَّ قَاتِلِ الْكَفَرَةَ الَّذِينَ يَصُدُّونَ عَنْ سَبِيلِكَ وَيُكَذِّبُونَ رُسُلَكَ ، وَلَا يُؤْمِنُونَ بِوَعْدِكَ ، وَخَالِفْ بَيْنَ كَلِمَتِهِمْ ، وَأَلْقِ فِي قُلُوبِهِمُ الرُّعْبَ ، وَأَلْقِ عَلَيْهِمْ رِجْزَكَ وَعَذَابَكَ ، إِلٰهَ الْحَقِّ » "O Allah, destroy and ruin those disbelievers who prevent others from Your path, who deny Your messengers, and do not believe in Your promise. Scatter their unity, cast terror into their hearts. O True Deity, impose Your punishment upon them." Then (the reciter and imam) would send blessings upon the Prophet Muhammad (peace and blessings be upon him) and supplicate for goodness and well-being for the Muslims as much as possible, then pray for forgiveness for the believers. The narrator states that when the imam finished cursing the disbelievers, sending blessings upon the Prophet (peace and blessings be upon him), and praying for forgiveness for the believing men and women, he would also supplicate: « اللّٰهُمَّ إِيَّاكَ نَعْبُدُ، وَلَكَ نُصَلِّي وَنَسْجُدُ وَإِلَيْكَ نَسْعٰى وَنَحْفِدُ، وَنَرْجُو رَحْمَتَكَ رَبَّنَا، وَنَخَافُ عَذَابَكَ الْجِدّ، إِنَّ عَذَابَكَ لِمَنْ عَادَيْتَ مُلْحِقٌ » "O Allah, we worship You alone, we pray and prostrate for You alone, and we strive and struggle towards You alone. O our Lord, we hope for Your mercy and fear Your severe punishment. Indeed, Your punishment will certainly befall Your enemies." Then the imam would say "Allahu Akbar" and bow down for prostration.