The Ornaments of Gold - 43:81
"Say: "If the Most Merciful had a child, I would have been the first of those who serve him."
The gravity of ascribing children to Allah:
Mary/19:88
"They even said: "The Most Merciful has taken a child"
وَقَالُوا اتَّخَذَ الرَّحْمٰنُ وَلَداًۜ
Mary/19:90
Because of this arrogance, almost the heavens will be torn asunder, the earth will split and the mountains will collapse.
تَكَادُ السَّمٰوَاتُ يَتَفَطَّرْنَ مِنْهُ وَتَنْشَقُّ الْاَرْضُ وَتَخِرُّ الْجِبَالُ هَداًّۙ
Mary/19:92
It does not befit the Most Merciful to have children.
وَمَا يَنْبَغ۪ي لِلرَّحْمٰنِ اَنْ يَتَّخِذَ وَلَداًۜ
Mary/19:93
Whoever is in the heavens and the earth will come to the Most Merciful as a servant.
اِنْ كُلُّ مَنْ فِي السَّمٰوَاتِ وَالْاَرْضِ اِلَّٓا اٰتِي الرَّحْمٰنِ عَبْداًۜ