[Machine] The Messenger of Allah ﷺ used to perform two light prostrations when dawn became clear before the prayer.
أَنَّ رَسُولَ اللهِ ﷺ كَانَ يُصَلِّي سَجْدَتَيْنِ خَفِيفَتَيْنِ حِينَ يَتَبَيَّنُ الْفَجْرُ قَبْلَ الصَّلَاةِ
[Machine] The Messenger of Allah ﷺ used to perform two light prostrations when dawn became clear before the prayer.
أَنَّ رَسُولَ اللهِ ﷺ كَانَ يُصَلِّي سَجْدَتَيْنِ خَفِيفَتَيْنِ حِينَ يَتَبَيَّنُ الْفَجْرُ قَبْلَ الصَّلَاةِ
Told him that when the Muaddhin fell silent, Messenger of Allah ﷺ would pray two brief rak'ahs. (Using translation from Nasāʾī 1772)
أَنَّ رَسُولَ اللهِ ﷺ كَانَ يُصَلِّي رَكْعَتَيْنِ خَفِيفَتَيْنِ إِذَا بَدَا الْفَجْرُ