Musnad Abu Ya'la al-Mawsili 140:53

Abu al-Rabi' al-Zahrani narrated to us, Salam narrated to us, from Zayd al-'Ammi, from Yazid al-Raqashi, from Anas ibn Malik: That the Messenger of Allah (peace be upon him) camped one night, and Bilal gave the Adhan. The Messenger of Allah (peace be upon him) said: "Whoever says the like of his statement and testifies the like of his testimony, then for him is Paradise."