Narrated Anas:

That the Prophet sent his uncle, the brother of Um Sulaim at the head of seventy riders. The chief of the pagans, 'Amir bin At-Tufail proposed three suggestions (to the Prophet ) saying, "Choose one of three alternatives: (1) that the bedouins will be under your command and the townspeople will be under my command;
(2) or that I will be your successor, (3) or otherwise I will attack you with two thousand from Bani Ghatafan." But 'Amir was infected with plague in the House of Um so-and-so. He said, "Shall I stay in the house of a lady from the family of so-and-so after having a (swelled) gland like that she-camel? Get me my horse." So he died on the back of his horse. Then Haram, the brother of Um Sulaim and a lame man along with another man from so-and-so (tribe) went towards the pagans (i.e. the tribe of 'Amir). Haram said (to his companions), "Stay near to me, for I will go to them. If they (i.e. infidels) should give me protection, you will be near to me, and if they should kill me, then you should go back to your companions. Then Haram went to them and said, "Will you give me protection so as to convey the message of Allah's Apostle ?" So, he started talking to them' but they signalled to a man (to kill him) and he went behind him and stabbed him (with a spear). He (i.e. Haram) said, "Allahu Akbar! I have succeeded, by the Lord of the Ka'ba!" The companion of Haram was pursued by the infidels, and then they (i.e. Haram's companions) were all killed except the lame man who was at the top of a mountain. Then Allah revealed to us a verse that was among the cancelled ones later on. It was: 'We have met our Lord and He is pleased with us and has made us pleased.' (After this event) the Prophet invoked evil on the infidels every morning for 30 days. He invoked evil upon the (tribes of) Ril, Dhakwan, Bani Lihyan and Usaiya who disobeyed Allah and His Apostle

حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا هَمَّامٌ، عَنْ إِسْحَاقَ بْنِ عَبْدِ اللَّهِ بْنِ أَبِي طَلْحَةَ، قَالَ حَدَّثَنِي أَنَسٌ، أَنَّ النَّبِيَّ ﷺ بَعَثَ خَالَهُ أَخٌ لأُمِّ سُلَيْمٍ فِي سَبْعِينَ رَاكِبًا، وَكَانَ رَئِيسَ الْمُشْرِكِينَ عَامِرُ بْنُ الطُّفَيْلِ خَيَّرَ بَيْنَ ثَلاَثِ خِصَالٍ فَقَالَ يَكُونُ لَكَ أَهْلُ السَّهْلِ، وَلِي أَهْلُ الْمَدَرِ، أَوْ أَكُونُ خَلِيفَتَكَ، أَوْ أَغْزُوكَ بِأَهْلِ غَطَفَانَ بِأَلْفٍ وَأَلْفٍ، فَطُعِنَ عَامِرٌ فِي بَيْتِ أُمِّ فُلاَنٍ فَقَالَ غُدَّةٌ كَغُدَّةِ الْبَكْرِ فِي بَيْتِ امْرَأَةٍ مِنْ آلِ فُلاَنٍ ائْتُونِي بِفَرَسِي. فَمَاتَ عَلَى ظَهْرِ فَرَسِهِ، فَانْطَلَقَ حَرَامٌ أَخُو أُمِّ سُلَيْمٍ هُوَ {وَ} رَجُلٌ أَعْرَجُ وَرَجُلٌ مِنْ بَنِي فُلاَنٍ قَالَ كُونَا قَرِيبًا حَتَّى آتِيَهُمْ، فَإِنْ آمَنُونِي كُنْتُمْ، وَإِنْ قَتَلُونِي أَتَيْتُمْ أَصْحَابَكُمْ. فَقَالَ أَتُؤْمِنُونِي أُبَلِّغْ رِسَالَةَ رَسُولِ اللَّهِ ﷺ. فَجَعَلَ يُحَدِّثُهُمْ وَأَوْمَئُوا إِلَى رَجُلٍ، فَأَتَاهُ مِنْ خَلْفِهِ فَطَعَنَهُ ـ قَالَ هَمَّامٌ أَحْسِبُهُ حَتَّى أَنْفَذَهُ ـ بِالرُّمْحِ، قَالَ اللَّهُ أَكْبَرُ فُزْتُ وَرَبِّ الْكَعْبَةِ. فَلُحِقَ الرَّجُلُ، فَقُتِلُوا كُلُّهُمْ غَيْرَ الأَعْرَجِ كَانَ فِي رَأْسِ جَبَلٍ، فَأَنْزَلَ اللَّهُ عَلَيْنَا، ثُمَّ كَانَ مِنَ الْمَنْسُوخِ إِنَّا قَدْ لَقِينَا رَبَّنَا فَرَضِيَ عَنَّا وَأَرْضَانَا. فَدَعَا النَّبِيُّ ﷺ عَلَيْهِمْ ثَلاَثِينَ صَبَاحًا، عَلَى رِعْلٍ وَذَكْوَانَ وَبَنِي لَحْيَانَ وَعُصَيَّةَ، الَّذِينَ عَصَوُا اللَّهَ وَرَسُولَهُ ﷺ.