Yusuf Ali
When the sky is rent asunder, and it becomes red like ointment:

Sahih International
And when the heaven is split open and becomes rose-colored like oil -

Shakir
And when the heaven is rent asunder, and then becomes red like red hide.

Pickthall
And when the heaven splitteth asunder and becometh rosy like red hide -

محمد جالندھری
پھر جب آسمان پھٹ کر تیل کی تلچھٹ کی طرح گلابی ہوجائے گا (تو) وہ کیسا ہولناک دن ہوگا