The son of Adam denied Me
The Prophet (sal Allahu alaihi wa sallam) said, “Allah Almighty has said: ‘The son of Adam denied Me and he had no right to do so. And he reviled Me and he had no right to do so. As for his denying Me, it is his saying: He will not remake me as He made me at first (i.e. bring me back to life after death) – and the initial creation [of him] is no easier for Me than remaking him. As for his reviling Me, it is his saying: Allah has taken to Himself a son, while I am the One, the Everlasting Refuge. I begot not nor was I begotten, and there is none comparable to Me.’”
In another narration, the Prophet (sal Allahu alaihi wa sallam) said, “There is no one more patient with something harmful that he hears than Allah. They attribute a son to Him, while it is He Who gives them sustenance and cures them” [Sahih Al-Bukhari]
To Allah belongs the dominion of the heavens and the earth, Allah says (interpretation of the meaning):
He to Whom belongs the dominion of the heavens and the earth, and Who has begotten no son (children or offspring) and for Whom there is no partner in the dominion. He has created everything, and has measured it exactly according to its due measurements. [Al-Furqan, 25:2]
Allah owns everything and He created everything. So how can He have a peer among His creatures who can be equal to Him, or a relative who can resemble Him Glorified, Exalted and far removed is Allah from such a thing.
Allah says (interpretation of the meaning): And they say: Ar-Rahman has begotten a son. Indeed you have brought forth (said) a terrible evil thing. Whereby the heavens are almost torn, and the earth is split asunder, and the mountains fall in ruins, that they ascribe a son to Ar-Rahman. But it is not suitable for Ar-Rahman that He should beget a son. There is none in the heavens and the earth but comes unto Ar-Rahman as a slave. Verily, He knows each one of them, and has counted them a full counting. And all of them will come to Him alone on the Day of Resurrection. [Maryam, 19: 88-95]
Many times in the Qur’an Allah denounces the existence of anything comparable to him. Allah says (interpretation of the meaning):
“There is nothing similar to Him, and He is the All-Hearer, All-Seer.” [Ash-Shura, 42:11]
“And there is none co-equal or comparable unto Him.” [Al-Ikhlass, 112:4]
“So put not forward similitude’s for Allah (as there is nothing similar to Him, nor He resembles anything). Truly! Allah knows and you know not.” [ An-Nahl, 16:74]
“O mankind! Worship your Lord (Allah), Who created you and those who were before you so that you may become Al-Muttaqûn (the pious), Who has made the earth a resting place for you, and the sky as a canopy, and sent down water (rain) from the sky and brought forth therewith fruits as a provision for you. Then do not set up rivals unto Allh (in worship) while you know (that He Alone has the right to be worshipped).” [Al-Baqarah, 2:21-22]
And Allah knows best!