Those who said in their adhan: Come to the best of deeds

Muslim bin Abi Maryam said: Ali bin Husayn used to give the adhan, and when he reached 'Hayya 'ala al-falah' (Come to success), he would say 'Hayya 'ala khayr al-'amal' (Come to the best of deeds), and he would say: This was the first adhan.

Sayyiduna Ibn Umar (may Allah be pleased with them both) used to say in his adhan 'Al-salatu khayrun min al-nawm' (Prayer is better than sleep), and sometimes he would also say 'Hayya 'ala khayr al-'amal' (Come to the best of deeds).

Sayyiduna Ibn Umar (may Allah be pleased with them both) would sometimes add 'Hayya 'ala khayr al-'amal' (Come to the best of deeds) to his adhan.