It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that the Prophet (peace and blessings of Allah be upon him) was asked about the sea. He (peace be upon him) said: "Its water is pure and its dead (animals) are lawful."

And the explanation of the evidence that the tanning by polytheists purifies the hides.

Sayyiduna Imran bin Husayn (may Allah be pleased with him) narrates that once we were on a journey with the Messenger of Allah (peace and blessings be upon him). The Prophet (peace be upon him) called a certain person and Sayyiduna Ali bin Abu Talib (may Allah be pleased with him) and said: "Go and search for water for us." So both of them went in search of water. They met a woman who was riding a camel between two water skins or two water bags. They asked her, "Where is water?" She replied, "Yesterday at this time I was at the water spring, and our men are behind." Sayyiduna Ali (may Allah be pleased with him) said to her, "Come with us." She asked, "Where?" They said, "To the Messenger of Allah (peace and blessings be upon him)." She said, "Is he the same person who is called a Sabi (one who has left the religion)?" They replied, "Yes, he is the one whom you think." So both of them took her and brought her to the Messenger of Allah (peace and blessings be upon him), and informed him of the whole situation. The Prophet (peace and blessings be upon him) said: "Tell her to dismount from her camel." Then the Messenger of Allah (peace and blessings be upon him) asked for a vessel, and placed the mouths of the bags or water skins into it. They said that then the Prophet (peace and blessings be upon him) rinsed his mouth and poured the water back into the bags or water skins. Then their mouths were opened and it was announced among the people that they should drink themselves and give their animals to drink. The narrator narrated the complete long hadith.

It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both), he says that the Prophet Muhammad (peace and blessings be upon him) intended to perform ablution from a waterskin. It was said to him that this is (a waterskin) made from the hide of a dead (animal). The Prophet (peace and blessings be upon him) said: "Its tanning removes its impurity, filth, and uncleanness."

Because the Prophet Muhammad (peace be upon him) ordered the drinking of camel urine along with their milk, and if their urine was impure, he (peace be upon him) would not have ordered it to be drunk, while he (peace be upon him) has already stated that there is no cure in something that is unlawful. And he (peace be upon him) also ordered seeking cure through camel urine. Therefore, if it were impure, it would be unlawful and would cause illness instead of cure, and there would be no cure in it, as the Prophet Muhammad (peace be upon him) has stated that when he (peace be upon him) was asked,“O Messenger of Allah, can wine be used as medicine?”he (peace be upon him) replied:“Wine is a disease, not a cure.”

Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that some people or some men from the tribes of ‘Ukl and ‘Uraynah came to the service of the Messenger of Allah (peace and blessings be upon him) in Madinah Munawwarah and announced their acceptance of Islam. They said,“O Messenger of Allah (peace and blessings be upon him), we are people who keep livestock (we herd animals) and we are not farmers.”Then the climate of Madinah Munawwarah did not suit them (so they became ill). The Messenger of Allah (peace and blessings be upon him) ordered that some camels and a shepherd be given to them, and instructed them to go out (outside Madinah Munawwarah) with those camels and drink their urine and milk. Then the complete hadith was narrated.

Some scholars have imagined that specifying the amount of one mudd of water for ablution is such a determination that it is not permissible to perform ablution with less water than this.

Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) used to perform ablution with one mudd and take a bath with five mudd. Imam Abu Bakr (may Allah have mercy on him) says that the "makook" mentioned in this hadith refers to "mudd" itself.

This does not mean that one cannot use less or more than a mudd of water for ablution. Because if it were not permissible to decrease or increase from a mudd of water, then it would become necessary for the person performing ablution to measure a mudd of water before ablution, and then perform ablution in such a way that nothing remains. Whereas sometimes the person performing ablution uses a little water carefully, and it is sufficient for washing the limbs of ablution, and sometimes more water is used carelessly, and it becomes insufficient for washing the limbs of ablution.

Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) narrates that the Messenger of Allah (peace and blessings be upon him) said: "A mudd (of water) is sufficient for ablution (wudu) and a sa’ (of water) is sufficient for (ritual) bath (ghusl) from janabah." A man said to him, "O Jabir, this amount (of water) is not enough for us." So he replied, "A person better, superior, and with more hair than you (the Prophet, peace and blessings be upon him) found this amount of water sufficient." Imam Abu Bakr (may Allah have mercy on him) says that in the statement of the Prophet (peace and blessings be upon him), "A mudd is sufficient for ablution," there is evidence that specifying a mudd as the amount for ablution means that this amount is sufficient. It does not mean that it is not permissible to use less or more than this amount.