[1]           His real name is 'Abdullah or 'Abdur-Rahman bin Sakhr Ad-Dausi, and was one of the greatest Sahaba (Companions of the Prophet PBUH) and reported the largest number of Ahadith. More than 800 men narrated from him. He became a Muslim in the year of Khaibar (7 H.) and stayed in the company of the Prophet (PBUH) until he (the Prophet PBUH) died. He was appointed a Mufti (scholar of Islamic verdicts) during the caliphate of' Umar and later became the governor of Al-Madina during the reign of Mawan bin Al-Hakam. He died in 59 H. and was buried at Al-Baqi'.

[2]           The collectors of Hadith: Abu Da’ud, At-Tirmidhi, An-Nasa'i and Ibn Majah.

[3]           His name is Sa'd bin Malik bin Sinan Al-Khazraji Al-Ansari. He was one of the learned Sahaba, reported many Ahadith and gave religious opinions for some time. He died at the beginning of 74H at the age of 86 years.

[4]           It is reported in Ahmad, At-Tirmidhi and Abu Da’ud that the Prophet (PBUH) said these words answering a question about the well of Bud'a, which is located in the vicinity of Al-Madina, and was always filled with filth. This well was situated in a low-lying area and the rainwater would carry all the dirt and garbage into it. These words are certainly about this well.

[5]           The collectors of Hadith: Abu Da'ud, At-Tirmidhi, and An-Nasa'i.

[6]           His name is Suday bin 'Ajlan, one of the Sahaba who reported many Ahadith. He lived in Egypt then moved to Hims (now in Syria) and died there at the age of 81 or 86 years.

[7]           Some of the people remark that water may be less or more in quantity, if filth alters its one quality out of three (its colors, odor and taste), it would become impure. But the proper view in this connection is that if water is less than 227 kilograms (two Qulla) then mere filth makes it impure, whether there is a change in any one of its quality or not, but when water is more than the said quantity, it does not get impure, until there is a change at least in one quality.

[8]           He was among the most ascetic and most knowledgeable Sahaba. He became a Muslim at Makka while a small boy, and mi grated to Al-Medina. He first participated in the battle of Al-Khandaq, died in 73AH, and was buried at Dhi Tuwa.

[9]           Qulla is a large earthen pot, which may contain water up to two and a half water-skins, viz., and one hundred and thirteen kilograms.

[10]         It means less quantity of water; if water is in abundance, it will be regarded as flowing water, which is not an impure one and is good for bathing. It has been prohibited to urinate in the stagnant water on the ground that one may not make it a habit and pollute the water. Condition of the stagnant water is only because flowing water is always clean and never becomes impure, even dirt and filth do not make it impure.

[11]         This man is one of the Sahaba, and failure to mention his name does not harm because the Sahaba are all trust worthy.

[12]         He is ‘Abdullah bin 'Abbas bin 'Abdul-Muttalib, the Prophet's cousin and the scholar of the Muslim Ummah. He was born 3 years before Al-Hijra and died at Ta'if in 67 AH.

[13]         This Hadith apparently seems to be in contradiction with the first, but actually it is not, because the order is not of absolute prohibition, but is only of suggestive prohibition to avoid any trace of impurity.

[14]         It must be clear that just to clean a thing from impurity, it is not necessary to wash a for seven times. The philosophy of cleaning a thing for seven times is different from that of simple purification. Physicians of today say that mostly in the intestines of dogs there are germs and small worms approximately 4 mm. in length, and these move out from intestines with the excrement and stick to the hair around the anus· When dogs clean this place with tongue, it gets soiled with these organisms If a dog licks a pot or someone kisses the dog, as the European and American ladies do, these ate transferred from dog to the pot or to the mouth of the woman and then to the stomach These organisms keep on moving, and penetrate into blood cells causing many fatal diseases· As the detection of these germs is not possible without microscopic tests, the Shari'a (Islamic law) declared the dog's saliva an inherently impure thing by a general command, and whatever a thing is polluted with dog's saliva, must be cleaned seven times (which in one time should be with the soil) to be sure of its purity. For more details please see the footnotes of the book Ahkam-ul-Ahsan, Sharh Umdat-ul-Ahkam].

[15]         He is Al-Harith bin Rib'i Al-Ansari, the prophet's horseman. He fought the battle of Uhud and those, which followed. It is said he died at Al-Madina or Kufa in 54H

[16]         Abu Da’ud, Tirmidhi, Nasa’i and Ibn Majah·

[17]         He was the Prophet’s servant from the time he came to Al-Madina till his death. He is known as Abu Hamza and was Khazraji· He lived in Basra during Umar's Caliphate and died in it at the age of 99 or 103 years in 91 or 92 or 93 H.

[18]         This Hadith proves that earth gets pure when dried up, as Ibn Abi Shaiba has narrated, specially when you let the water flow over the spot.

[19]         Al-Bukhari and Muslim

[20]         It is evident from this Hadith that if a fly drops into water or syrup, it will not become impure, and the creatures of this family who's blood does not flow, like mosquito, wasp and spider, etc, do not make the water impure if fallen or died into it.

[21]         His name is Al-Harith bin 'Auf and is a descendant of Banu 'Aamir bin Laith. He became a Muslim very early and is counted among the people of Al-Madina. It is said that he fought at Badr, lived in Makka and died in it in 65H or 68H at the age· of 57 and was buried at Funj.