The Women - 4:171
"People of the Book! Do not exceed the limits in your religion. Speak only the truth about Allah. Jesus Christ, son of Mary, is only a messenger of Allah and His word which He sent to Mary, and a life from Him. Believe in Allah and His messengers. Do not say, "There are three."Put an end to it for your own benefit. Allah alone is the only God. He is greater than having children. To Him belongs whatever is in the heavens and whatever is in the earth. Allah is sufficient as a Surrogate."
The gravity of ascribing children to Allah:
Mary/19:88
"They even said: "The Most Merciful has taken a child"
Mary/19:89
You have put forward an arrogant argument.
Mary/19:90
Because of this arrogance, almost the heavens will be torn asunder, the earth will split and the mountains will collapse.
Mary/19:91
Because they ascribed a child to the Most Merciful.
Mary/19:92
It does not befit the Most Merciful to have children.
Mary/19:93
Whoever is in the heavens and the earth will come to the Most Merciful as a servant.
The Cattle/6:101
He it is Who created the heavens and the earth out of nothing. How can He have a child when He has no partner? He is the Creator of all things and He is All-Knowing.
The Night Journey/17:40
Has your Lord chosen sons for you and has He taken for Himself daughters from the angels? You are making a very great claim.