(1) From Muslim's collection of Hadith [1], Book 026, Number 5557:


Abu as-Sa'ib, the freed slaved of Hisham b. Zuhra, said that he visited Abu Sa'id Khudri in his house, (and he further) said: I found him saying his prayer, so I sat down waiting for him to finish his prayer when I heard a stir in the bundles (of wood) lying in a comer of the house. I looked towards it and found a snake. I jumped up in order to kill it, but he (Abu Sa'id Khudri) made a gesture that I should sit down. So I sat down and as he finished (the prayer) he pointed to a room in the house and said: Do you see this room? I said: Yes. He said: There was a young man amongst us who had been newly wedded. We went with Allah's Messenger (to participate in the Battle) of Trench when a young man in the midday used to seek permission from Allah's Messenger to return to his family. One day he sought permission from him and Allah's Messenger (after granting him the permission) said to him: Carry your weapons with you for I fear the tribe of Quraiza (may harm you). The man carried the weapons and then came back and found his wife standing between the two doors. He bent towards her smitten by jealousy and made a dash towards her with a spear in order to stab her. She said: Keep your spear away and enter the house until you see that which has made me come out. He entered and found a big snake coiled on the bedding. He darted with the spear and pierced it and then went out having fixed it in the house, but the snake quivered and attacked him and no one knew which of them died first, the snake or the young man. We came to Allah's Apostle and made a mention to him and said: Supplicate to Allah that that (man) may be brought back to life. Thereupon he said: Ask forgiveness for your companion and then said: There are in Medina “Jinns” who have accepted Islam, so when you see any one of them, pronounce a warning to it for three days, and if they appear before you after that, then kill it for that is a devil.










NOTE: If you don’t know what “Jinn” are, see the link below for further information.


http://answering-islam.org/Index/J/jinn.html










(2) From Muslim's collection of Hadith Book 026, Number 5558:


Asma' b. 'Ubaid reported about a person who was called as-Sa'ib having said: We visited Abu Sa'id Khudri. When we had been sitting (with him) we heard a stir under his bed. When we looked we found a big snake, the rest of the hadith is the same. And in this Allah's Messenger is reported to have said: Verily in these houses there live aged (snakes), so when you see one of them, make life hard for it for three days, and if it goes away (well and good), otherwise kill it for (in that case) it would be a nonbeliever. And he (the Holy Prophet) said (to his Companions): Go and bury your companion (who had died by the snake bite).














(3) Sunan of Abu Dawud, Book 41, Number 5236:


Narrated Abu Sa'id al-Khudri:


Muhammad ibn Abu Yahya said that his father told that he and his companion went to Abu Sa'id al-Khudri to pay a sick visit to him. He said: Then we came out from him and met a companion of ours who wanted to go to him. We went ahead and sat in the mosque. He then came back and told us that he heard Abu Sa'id al-Khudri say: The Apostle of Allah said: Some snakes are jinn; so when anyone sees one of them in his house, he should give it a warning three times. [4521]. If it return (after that), he should kill it, for it is a devil.






Hasan’s note 4521 states:


The verb means to make things difficult. It means that one should tell the snake three times that it will be in difficulties if it returns. It should not blame one if it is driven away and killed. The warning should be given for three days. There is a difference of opinion whether it should be given three times or for three days. What is agreed is that it should be given three times for three days.










(4) Sunan of Abu Dawud, Book 41, Number 5240:


Narrated AbdurRahman Ibn Abu Layla:


The Apostle of Allah was asked about the house-snakes. He said: When you see one of them in your dwelling, say: I adjure you by the covenant which Noah made with you, and I adjure you by the covenant which Solomon made with you not to harm us. Then if they come back, kill them.










(5) Sunan of Abu Dawud Book 41, Number 5229:


Narrated Abdullah ibn Mas'ud:


The Prophet said: Kill all the snakes, and he who fears their revenge does not belong to me.










(6) Sahih Muslim, Book 026, Number 5544:


Salim, on the authority of his father. reported Allah's Apostle as saying: Kill the snakes having stripes over them and short-tailed snakes, for these two types cause miscarriage (of a pregnant woman) and they affect the eyesight adversely. So Ibn 'Umar used to kill every snake that he found. Abu Lubaba b. 'Abd al-Mundhir and Zaid b. Khattab saw him pursuing a snake, whereupon he said: They were forbidden (to kill) those snakes who live in houses.










(7) Sunan of Abu Dawud, Number 5232:


Ibn Umar reported the Apostle of Allah as saying: Kill snakes, kill those which have two streaks and those with small tails, for they obliterate he eyesight and cause miscarriage. [4519].


Salim said: Abd Allah used to kill every snake which he found. Abu Lubabah or Zaid b. al-Khattab saw him chasing a snake. He said: He (the Prophet) prohibited killing house snakes. [4520]






Hasan’s note 4519 says,


They were poisonous snakes and caused harm to people. The people are commanded to kill them.






Hasan’s note 4520 says,


The version of al-Bukhari and Muslim has: For they are resident jinn.










(8) Sahih Muslim, Book 026, Number 5559:


Abu Sa'id Khudri reported Allah's Messenger having said: There is a group of Jinns in Medina who accepted Islam, so he who would see anything from these occupants should warn him three times; and if he appears after that, he should kill him for he is a Satan. [2607]






Siddiqi’s note 2607 reads:


It is on the basis of this hadith that some of the scholars are of the opinion that it is not proper to kill snakes of Medina without issuing them a grim warning with these words: “adjure you in the name of that Covenant which Hadrat Sulaiman took from you that you should not harm us and do not appear again.” This is not essential for any other place besides Medina. The reason for this is that some of the Jinns had embraced Islam and they lived in the houses and at times assumed the form of big snakes. (Nawawi, Vol II, p. 234).