Imam Malik bin Anas recorded from `Ubayd bin Hunayn that he heard Abu Hurayrah saying, “I went out with the Prophet and he heard a man reciting `Say: He is Allah, the One.’ So the Messenger of Allah said,
“It is obligatory.”
I asked, `What is obligatory?’
He replied, “Paradise;” [is obligatory upon the one who says with conviction `Say: He is Allah, the One.’]
At-Tirmidhi and An-Nasa’i also recorded it by way of Malik, and At-Tirmidhi said, “Hasan Sahih Gharib. We do not know of it except as a narration of Malik.” The Hadith in which the Prophet said,
“Your love of it will cause you to enter Paradise.”
In another hadith Imam Ahmad recorded from Ubayy bin Ka`b that the idolaters said to the Prophet, “O Muhammad! Tell us the lineage of your Lord.” So Allah revealed;
SAY! He is Allah, The One [Ahad].
Allah The Eternal [As-Samad]
As-Samad is One Who does not give birth, nor was He born, because there is nothing that is born except that it will die, and there is nothing that dies except that it leaves behind inheritance, and indeed Allah does not die and He does not leave behind any inheritance.
Declaring that GOD begets not, nor is He begotten is such an evident principle for the Uniqueness of Allah and its mentioning here refutes all creeds that attribute sons or daughters to GOD. It primarily and categorically refutes the pagans attribution to Him of the angels as daughters and the Christians’ seeing Him as the Father of Jesus عَلَيْهِ السَّلاَمُ , or their saying that Jesus عَلَيْهِ السَّلاَمُ is the son of GOD; as well as claims of some that GOD came in a person called Fard Mohammad. That is Shirk – a negation of true belief in Allah. Allah has no need of help in any way. He is The Creator and Sustainer of all that exists.