"We prostrated with the Messenger of Allah ﷺ during: When the heaven is split asunder and Read! In the Name of your Lord." (Using translation from Nasāʾī 963)
سَمِعْتُ أَبَا هُرَيْرَةَ يَقُولُ سَجَدْتُ مَعَ النَّبِيِّ ﷺ فِي إِذَا السَّمَاءُ انْشَقَّتْ وَاقْرَأْ بِاسْمِ رَبِّكَ