[Machine] I used to give the call to prayer during the time of the Prophet ﷺ for the Fajr prayer. When I said "Hayya 'ala al-Falah" (come to success), I would say "Prayer is better than sleep" twice, and then I would say the first adhan.
كُنْتُ أُؤَذِّنُ فِي زَمَنِ النَّبِيِّ ﷺ فِي صَلَاةِ الصُّبْحِ فَإِذَا قُلْتُ حَيَّ عَلَى الْفَلَاحِ قُلْتُ الصَّلَاةُ خَيْرٌ مِنَ النَّوْمِ الصَّلَاةُ خَيْرٌ مِنَ النَّوْمِ الْأَذَانُ الْأَوَّلُ