Council - 42:5
The heavens will almost crack. The angels will praise and glorify their Lord and ask forgiveness for those on the earth. Allah is Most Forgiving, Most Merciful.
In the context of verses 4, 5: The heavens would be torn asunder because they ascribed a child 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.