"I used to call the Adhan for the Messenger of Allah ﷺ and in the first Adhan of Fajr I used to Say: 'Hayya 'ala al-falah, as-salatu khairun minan-nawm, as-salatu khairun minan-nawm, Allahu Akbar Allahu Akbar, la ilaha illallah (Come to prosperity, prayer is better than sleep, prayer is better than sleep, Allah is the Greatest, Allah is the Greatest, there is none worthy of worship except Allah).'"  

كُنْتُ أُؤَذِّنُ لِرَسُولِ اللَّهِ ﷺ وَكُنْتُ أَقُولُ فِي أَذَانِ الْفَجْرِ الأَوَّلِ حَىَّ عَلَى الْفَلاَحِ الصَّلاَةُ خَيْرٌ مِنَ النَّوْمِ الصَّلاَةُ خَيْرٌ مِنَ النَّوْمِ اللَّهُ أَكْبَرُ اللَّهُ أَكْبَرُ لاَ إِلَهَ إِلاَّ اللَّهُ  

[Machine] I heard him say, "How should I give the adhan (call to prayer) for the Prophet ﷺ?" So I used to say in the first adhan of Fajr after "hayya 'ala al-falah, hayya 'ala al-falah, as-salatu khayrun min an-nawm, as-salatu khayrun min an-nawm, Allahu akbar, Allahu akbar, la ilaha illallah." Abu Abdullah al-Hafiz informed us, narrating from Ali ibn Hamsad, narrating from Yazid ibn al-Haytham, narrating from Ibrahim ibn Abi Layth, narrating from al-Ashja'i, from Sufyan, who mentioned him. And Abu Sulayman's name was Hammam, the mu'adhdhin.  

سَمِعْتُهُ يَقُولُ كَيْفَ أُؤَذِّنُ لِلنَّبِيِّ ﷺ فَكُنْتُ أَقُولُ فِي الْأَذَانِ الْأَوَّلِ مِنَ الْفَجْرِ بَعْدَ حِيَّ عَلَى الْفَلَاحِ حِيَّ عَلَى الْفَلَاحِ الصَّلَاةُ خَيْرٌ مِنَ النَّوْمِ الصَّلَاةُ خَيْرٌ مِنَ النَّوْمِ اللهُ أَكْبَرُ اللهُ أَكْبَرُ لَا إِلَهَ إِلَّا اللهُ أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ ثنا عَلِيُّ بْنُ حَمْشَاذٍ ثنا يَزِيدُ بْنُ الْهَيْثَمِ ثنا إِبْرَاهِيمُ بْنُ أَبِي اللَّيْثِ ثنا الْأَشْجَعِيُّ عَنْ سُفْيَانَ فَذَكَرَهُ وَأَبُو سُلَيْمَانَ اسْمُهُ هَمَّامٌ الْمُؤَذِّنُ