The Repentance - 9:30
"The Jews said: "Uzeyr is the son of Allah". And the Christians said: "Christ is the son of Allah". This is the word of their mouths. They imitate the words of those who disbelieved before. Allah will condemn them. How are they being converted?"
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.