It is written in the Holy Quran about Ahlulbait (p.b.u.h.): "O people of the (prophet’s) house! ALLAH intends but to remove all sorts of uncleanness and blemish from you and to purify you with a thorough purification". (The Holy Quran sura 33 Ahzaab- 33)

All commentators (exegesis) of the Holy Quran agree what this verse is about: The Prophet Muhammad (p.b.u.h.) Ali Ibn Abi Talib (p.b.u.h.), Lady Fatimah Al-Zahra (p.b.u.h.) and their sons Hassan (p.b.u.h.) and Hossain (p.b.u.h.). This is an Announcement to the entire world, about the purity and the infallibility of them. Lady Fatimah Al-Zahra (p.b.u.h.) has such a high position that if we take the time to look at only some of them there will be no doubt to anyone that Lady Fatimah Al-Zahra (p.b.u.h.) is truly the mistress of all women of the world and Paradise, and is of the most special and beloved creations of ALLAH (swt).

"Say: I do not ask of you any reward for it but love for my near of kin; and whoever earns good, We give him more of good therein; surely ALLAH is Forgiving, Grateful. (The Holy Quran 42 As-Shura: 23)

It is unanimous amongst all Exegesis of the Quran this Ayat is about the love all believers must have for the Ahlulbait (p.b.u.h.) of the Holy Prophet Muhammad (p.b.u.h.). Many Hadith about this Ayat can also be found in many correct books of hadith, including the following non-Shia sources: Ibn Hijr in: Al-Muhriqah, Sayuti in Al-Dur Al-Manthour, Abu Nu’aym in Hilyat Al-Awlia, Hamwini Shafe’I in Al-Fara’ed.

The Prophet Muhammad (p.b.u.h.) said:

"Fatimah is a part of me; whoever pleases her pleases me and whoever displeases her, displeases me. She is dearer to me than all beings". (Al-Amaali, Shaykh Al-Mufid (r-a): 13th Assembly, hadith # 2).

The Prophet Muhammad (p.b.u.h.) said:

"O Salman! Whoever loves Fatimah, my daughter, will be in Heaven with me; and whoever dislikes her, then that one will be in (Hell) Fire". (Fara’id-us-Samtayn, vol2, p.67)

The Prophet Muhammad (p.b.u.h.) said:

"The best women of paradise are: Khadija Bint Khowailid, Fatimah Bint Muhammad, Asia Bint Muzahim (Pharaoh’s wife) and Maryam Bint Imran". (Musnad Ahmad vol 2 p.293)

The Prophet Muhammad (p.b.u.h.) said:

"The best women of the world are four: Maryam Bint Imran, Asia Bint Muzahim, Khadija Bint Khowailid and Fatimah Bint Muhammad". (Musnad Ahmad vol 2 p. 293)

Aisha Bint Talha quoted Aisha as saying: "I have not seen anyone more similar to the Messenger of ALLAH in speech and dialogue than Fatimah. Whenever she entered the house, he would greet her, kiss her hands and ask her to sit near him. Likewise, when the Prophet entered the house, she would greet him, kiss his hands and ask him to sit near her".

The Prophet Muhammad (p.b.u.h.) said:

"As for my daughter Fatimah, she is the mistress of all women; from the beginning of history until the end. She is part of me; she is the light of my eye and the fruit of my heart. Fatimah is my spirit which I hold in me; she is a human huri. Whenever she keeps up prayers in her Mehrab before her LORD, her light illuminates the angels in the Heaven just as a star shines to mankind on Earth.

So ALLAH, Exalted is HIS name, says to the angels:

'My angels, look at my servant, Fatimah, who is the mistress of all my female servants, keeping up prayers before ME. Her limbs shake from fear of ME and she worships ME wholeheartedly. Bear witness that I have safeguarded her Shiites (followers) from Hellfire…’" (Bihar Al-Anwar vol.10)

Imam Hasan (p.b.u.h.) said:

"Once, on a Friday night, I watched my mother, Fatimah, pray all night long. She kept making ruku’ and prostrating until dawn. I heard her supplicate for the believers by name; but she did not supplicate for herself, so I asked: 'Mother, why don’t you supplicate for yourself as you supplicate for others?’

She answered: 'Son! Prefer your neighbour over yourself.’" (Bihar Al-Anwar vol 10)

We can now understand the very special place Lady Fatimah Az-Zahra (p.b.u.h.) has, not only for the women, but for all human beings. Lady Fatimah Az-Zahra (p.b.u.h.) is truly a most perfect example of ethics and human virtue.

Al-Kauthar in the Holy Quran means Hadrat Fatima Zahra (p.b.u.h.)

"In the Name of Allah, the Beneficent, the Merciful.
Verily We have given you (O Muhammad) Kauthar.
So pray to your Lord and offer sacrifice.
Verily it your enemy whose line (progeny) shall be cut off". (108: 1-3)

Purpose of Revelation

One day 'Aas Ibn Wael, who was one of the leaders of the Mushrikeen of Makkah saw the Holy Prophet (p.b.u.h.) coming out of Masjidul-Haraam. Therefore, he stopped and conversed with him for some while. Meanwhile, some other elders of Mushrikeen who were inside the mosque were observing this. When the conversation was over and 'Aas came inside the mosque, the group asked, "O 'Aas! Whom were you chatting to?" He responded by saying, "With that person who is Abtar".
Abtar means "Tail-less" – a person whose progeny has been cut off. The Holy prophet (p.b.u.h.) had two sons from Khadija (p.b.u.h.) namely Qasim and Tahir. Since both of them had died, leaving the prophet without any sons, the pagan Arabs started calling the prophet (p.b.u.h.) Abtar.
As a consolation to the Prophet (p.b.u.h.) ,Surah al-Kauthar was revealed.