Musannaf Ibn Abi Shaybah 2260 — Those who said in their adhan: Come

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).