Awn bin Abi Juhayfah narrates the hadith from his father, Sayyiduna Abu Juhayfah (may Allah be pleased with him), that he performed ablution and Bilal (may Allah be pleased with him) gave the adhan; I kept following his mouth this way and that, and he would turn his face right and left, saying: 'Hayya 'alas-salah' (Come to the prayer), 'Hayya 'alal-falah' (Come to success).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 1851