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"
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.