'A'isha reported that the Messenger of Allah ﷺ used to observe two (supererogatory) rak'ahs in between the call to prayer and the Iqama of the dawn prayer.
أَنَّ نَبِيَّ اللَّهِ ﷺ كَانَ يُصَلِّي رَكْعَتَيْنِ بَيْنَ النِّدَاءِ وَالإِقَامَةِ مِنْ صَلاَةِ الصُّبْحِ