Chapter of Types of Impurities
1) Human faeces and urine:
Faeces’ being impure is proven by the following hadith:
Abu Hurairah narrates that the Messenger of Allah (Sallallahu alayhi was sallam) said, “If one of you steps with his sandals into something filthy (al-adha), then dirt is the purification for it”. Al-adha – refers to everything that harms someone, such as impure things, filth, rocks and thorns.
As for urine there is a hadith narrated Anas Bin Maalik were he said: While we were in the masjid with the Messenger of Allaah, a Bedouin came; he then urinated in the masjid. The Companions of the Messenger of Allaah said, “Mah Mah (An expression used to severely scold someone, to indicate the graveness of a matter).” The Messenger of Allaah said, “Do not put a halt to his urinating, but instead leave him.” They left him alone until he finished urinating. The Messenger of Allaah (Sallallahu alayhi was sallam) called him over and said to him, “Any kind of urine or filth is not suitable for these masjids. Instead they are only [appropriate] for the remembrance of Allaah, the Prayer, and the recitation of the Qur’an,” or this is near to what the Messenger of Allaah said. He (Sallallahu alayhi was sallam) then issued an order to a man from the people, who then came with a bucket of water, which he poured over the [effected] area [of the masjid].
2) Al-Madhi (prostatic fluid) and Al-Wadi (is a thick white secretion discharged):
Al-Madhi is a clear sticky fluid that flows from the sexual organs because of thinking about sexual intercourse or foreplay, and so on. The person is usually not aware of when exactly it is secreted. It comes from both the male and the female sexual organs. Scholars are agreed that it is impure. If it gets on the body, it is obligatory to wash it off.
‘Ali ibn Abi Talib stated, “I was a person who would have Madhi come out often but I was too shy to ask the Prophet () about it, due to my relationship with his daughter (‘Ali was the Prophet’s son-in-law). Thus, I requested al-Miqdaad ibn al-Aswad to ask him. (He did) and the Prophet () said, ‘He should wash your private part and make Wudu (ablution).”
Al-Wadi is a thick white secretion discharged (by some people) after urination. It is considered impure:
Abdullah Ibn ‘Abbas related that “Al-Mani (sperm) requires ghusl. As for madhi and Wadi they require a complete purification.” This is related by al-Athram. Imam Al-Bayhaqi has it with the wording, “Concerning madhi (prostatic fluid) and Wadi, he said, ‘Wash your private part and perform ablution as you perform for prayer.”‘
Imam An-Nawawi (may Allah have mercy on him) said: “The Ummah is unanimously agreed that Madhi and Wadi are Najis (impure).”
3) Dung and urine of animals that are not Halal to consume:
Abdullah ibn Mas’ud said, “The Messenger of Allah (Sallallahu alayhi was sallam) went to relieve himself and said, ‘Bring me three stones.’ I brought him two stones and a piece of dung. He took the two stones and discarded the dung, saying, ‘It is filth.’”
4) Menstrual Blood:
Asma’ bint Abi Bakr stated that a women came to the Prophet (Sallallahu alayhi was sallam) and said, “We get menstrual blood on our clothing, so what should we do?” he replied, “Rub it, then scratch it off with water and then wet it and then (you can) pray in it.”
5) Dog Saliva:
Abu Hurairah reported: The Messenger of Allah (may peace be upon him) said: “The purification of the utensil belonging to any one of you, after it is licked by a dog, lies in washing it seven times, using sand (earth) for the first time.”
6) Dead Animal:
This refers to the animal that has died without being slaughtered according to Sharia (Islamic Law).
Abdullah Ibn `Abbas relates that Allah’s Messenger (Sallallahu alayhi was sallam) said: “If the hide of an animal is tanned, it becomes pure.”
The exceptions for the skin of carrion being impure are following:
I. Dead fish and locusts are considered pure
II. Animals that do not have circulating blood in them, such as flies, ants, bees and so on are all pure.
III. Bones, horns, nails, hairs and feathers of dead animals are all pure.
 Recorded in Bukhari and Muslim
 Recorded in Sahih Bukhari and Sahih Muslim
 Recorded in Sahih Bukhari
 Recorded by Imam Bayhaqi. Graded Sahih by sheikh albani.
Sharh al-Muhadhdhab, 2/571
 Recorded in Sunan ibn Majah. Graded Sahih by sheikh albani. In different wording it is recorded by Bukhari and Tirmizi.
 Recorded in Bukhari and Muslim. This is the wording in Muslim.
 Recorded in Muslim
 Recorded in Muslim and Abu Dawood