We were with Messenger of Allah ﷺ in some of his journeys and there was a woman from the Ansar riding a she-camel that it shied and she invoked curse upon that. Messenger of Allah ﷺ heard it and said: Unload that and set it free for it is accursed. 'Imran said: I still perceive that (dromedary) walking amongst people and none taking any notice of that.  

بَيْنَمَا رَسُولُ اللَّهِ ﷺ فِي بَعْضِ أَسْفَارِهِ وَامْرَأَةٌ مِنَ الأَنْصَارِ عَلَى نَاقَةٍ فَضَجِرَتْ فَلَعَنَتْهَا فَسَمِعَ ذَلِكَ رَسُولُ اللَّهِ ﷺ فَقَالَ خُذُوا مَا عَلَيْهَا وَدَعُوهَا فَإِنَّهَا مَلْعُونَةٌ قَالَ عِمْرَانُ فَكَأَنِّي أَرَاهَا الآنَ تَمْشِي فِي النَّاسِ مَا يَعْرِضُ لَهَا أَحَدٌ  

I perceive as if I am looking towards that dromedary, and in the hadith transmitted on the authority of Thaqafi (the words are):" Unload it and make its back bare for it is accursed."  

عَنْ أَيُّوبَ بِإِسْنَادِ إِسْمَاعِيلَ نَحْوَ حَدِيثِهِ إِلاَّ أَنَّ فِي حَدِيثِ حَمَّادٍ قَالَ عِمْرَانُ فَكَأَنِّي أَنْظُرُ إِلَيْهَا نَاقَةً وَرْقَاءَ وَفِي حَدِيثِ الثَّقَفِيِّ فَقَالَ خُذُوا مَا عَلَيْهَا وَأَعْرُوهَا فَإِنَّهَا مَلْعُونَةٌ  

Go ahead (but that dromedary did not move). She (that slave-girl), out of anger, said: O Allah, let that (dromedary) be damned. Thereupon Allah's Apostle ﷺ said: Let the dromedary on which the curse has been invoked not proceed with us.  

بَيْنَمَا جَارِيَةٌ عَلَى نَاقَةٍ عَلَيْهَا بَعْضُ مَتَاعِ الْقَوْمِ إِذْ بَصُرَتْ بِالنَّبِيِّ ﷺ وَتَضَايَقَ بِهِمُ الْجَبَلُ فَقَالَتْ حَلْ اللَّهُمَّ الْعَنْهَا قَالَ فَقَالَ النَّبِيُّ ﷺ لاَ تُصَاحِبُنَا نَاقَةٌ عَلَيْهَا لَعْنَةٌ  

" By Allah, let that accompany us not which has been damned, or he said like it."  

عَنْ سُلَيْمَانَ التَّيْمِيِّ بِهَذَا الإِسْنَادِ وَزَادَ فِي حَدِيثِ الْمُعْتَمِرِ لاَ ايْمُ اللَّهِ لاَ تُصَاحِبُنَا رَاحِلَةٌ عَلَيْهَا لَعْنَةٌ مِنَ اللَّهِ أَوْ كَمَا قَالَ  

It does not seem proper for a Siddiq that he should be an invoker of curse.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لاَ يَنْبَغِي لِصِدِّيقٍ أَنْ يَكُونَ لَعَّانًا  

This hadith has been narrated on the authority of Abu Kuraib with the same chain of transmitters.  

عَنِ الْعَلاَءِ بْنِ عَبْدِ الرَّحْمَنِ بِهَذَا الإِسْنَادِ مِثْلَهُ  

I heard you cursing your servant during the night when you called him, and she said: I heard Abu Darda' as saying that Messenger of Allah ﷺ said: The invoker of curse would neither be intercessor nor witness on the Day of Resurrection.  

أَنْ كَانَ ذَاتَ لَيْلَةٍ قَامَ عَبْدُ الْمَلِكِ مِنَ اللَّيْلِ فَدَعَا خَادِمَهُ فَكَأَنَّهُ أَبْطَأَ عَلَيْهِ فَلَعَنَهُ فَلَمَّا أَصْبَحَ قَالَتْ لَهُ أُمُّ الدَّرْدَاءِ سَمِعْتُكَ اللَّيْلَةَ لَعَنْتَ خَادِمَكَ حِينَ دَعَوْتَهُ فَقَالَتْ سَمِعْتُ أَبَا الدَّرْدَاءِ يَقُولُ قَالَ رَسُولُ اللَّهِ ﷺ لاَ يَكُونُ اللَّعَّانُونَ شُفَعَاءَ وَلاَ شُهَدَاءَ يَوْمَ الْقِيَامَةِ  

This hadith has been narrated on the authority of Zaid b. Aslam with the same chain of transmitters.  

عَنْ زَيْدِ بْنِ أَسْلَمَ فِي هَذَا الإِسْنَادِ بِمِثْلِ مَعْنَى حَدِيثِ حَفْصِ بْنِ مَيْسَرَةَ  

I heard Messenger of Allah ﷺ as saying: The invoker of curse would neither be witness nor intercessor on the Day of Resurrection.  

سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ إِنَّ اللَّعَّانِينَ لاَ يَكُونُونَ شُهَدَاءَ وَلاَ شُفَعَاءَ يَوْمَ الْقِيَامَةِ  

Invoke curse upon the polytheists, whereupon he said: I have not been sent as the invoker of curse, but I have been sent as mercy."  

قِيلَ يَا رَسُولَ اللَّهِ ادْعُ عَلَى الْمُشْرِكِينَ قَالَ إِنِّي لَمْ أُبْعَثْ لَعَّانًا وَإِنَّمَا بُعِثْتُ رَحْمَةً