Abu al-Sa’ib said I went to visit Abu Sa’ld al-Khudri, and while I was sitting I heard a movement under under his couch. When I looked and found a snake there, I got up. Abu Sa’ld said:
what is with you? I said : Here is a snake. He said : what do you want ? I said : I shall kill it. He then pointed to a room in his house in front of his room and said : My cousin (son of my uncle) was in this room. He asked his permission to go to his wife on the occasion of the battle of Troops (Ahzab), as he was recently married. The Messenger of Allah ﷺ gave him permission and ordered him to take his weapon with him. He came to his house and found his wife standing at the door of the house. When he pointed to her with the lance, she said; do not make haste till you see what has brought me out. He entered the house and found an ugly snake there. He pierced in the lance while it was quivering. He said : I do not know which of them died first, the man or the snake. His people then came to the Messenger of Allah ﷺ and said: supplicate Allah to restore our companion to life for us. He said : Ask forgiveness for your Companion. Then he said : In Medina a group of Jinn have embraced Islam, so when you see one of them, pronounce a waring to it three times and if it appears to you after that, kill it after three days.

حَدَّثَنَا يَزِيدُ بْنُ مَوْهَبٍ الرَّمْلِيُّ، حَدَّثَنَا اللَّيْثُ، عَنِ ابْنِ عَجْلاَنَ، عَنْ صَيْفِيٍّ أَبِي سَعِيدٍ، مَوْلَى الأَنْصَارِ عَنْ أَبِي السَّائِبِ، قَالَ أَتَيْتُ أَبَا سَعِيدٍ الْخُدْرِيَّ فَبَيْنَا أَنَا جَالِسٌ، عِنْدَهُ سَمِعْتُ تَحْتَ، سَرِيرِهِ تَحْرِيكَ شَىْءٍ فَنَظَرْتُ فَإِذَا حَيَّةٌ فَقُمْتُ فَقَالَ أَبُو سَعِيدٍ مَا لَكَ فَقُلْتُ حَيَّةٌ هَا هُنَا . قَالَ فَتُرِيدُ مَاذَا قُلْتُ أَقْتُلُهَا . فَأَشَارَ إِلَى بَيْتٍ فِي دَارِهِ تِلْقَاءَ بَيْتِهِ فَقَالَ إِنَّ ابْنَ عَمٍّ لِي كَانَ فِي هَذَا الْبَيْتِ فَلَمَّا كَانَ يَوْمُ الأَحْزَابِ اسْتَأْذَنَ إِلَى أَهْلِهِ وَكَانَ حَدِيثَ عَهْدٍ بِعُرْسٍ فَأَذِنَ لَهُ رَسُولُ اللَّهِ ﷺ وَأَمَرَهُ أَنْ يَذْهَبَ بِسِلاَحِهِ فَأَتَى دَارَهُ فَوَجَدَ امْرَأَتَهُ قَائِمَةً عَلَى بَابِ الْبَيْتِ فَأَشَارَ إِلَيْهَا بِالرُّمْحِ فَقَالَتْ لاَ تَعْجَلْ حَتَّى تَنْظُرَ مَا أَخْرَجَنِي . فَدَخَلَ الْبَيْتَ فَإِذَا حَيَّةٌ مُنْكَرَةٌ فَطَعَنَهَا بِالرُّمْحِ ثُمَّ خَرَجَ بِهَا فِي الرُّمْحِ تَرْتَكِضُ قَالَ فَلاَ أَدْرِي أَيُّهُمَا كَانَ أَسْرَعَ مَوْتًا الرَّجُلُ أَوِ الْحَيَّةُ فَأَتَى قَوْمُهُ رَسُولَ اللَّهِ ﷺ فَقَالُوا ادْعُ اللَّهَ أَنْ يَرُدَّ صَاحِبَنَا . فَقَالَ " اسْتَغْفِرُوا لِصَاحِبِكُمْ " . ثُمَّ قَالَ " إِنَّ نَفَرًا مِنَ الْجِنِّ أَسْلَمُوا بِالْمَدِينَةِ فَإِذَا رَأَيْتُمْ أَحَدًا مِنْهُمْ فَحَذِّرُوهُ ثَلاَثَ مَرَّاتٍ ثُمَّ إِنْ بَدَا لَكُمْ بَعْدُ أَنْ تَقْتُلُوهُ فَاقْتُلُوهُ بَعْدَ الثَّلاَثِ " .