Musnad Abu Ya'la al-Mawsili 140:6

Abu al-Rabi' al-Zahrani narrated to us, Nuh ibn Qays narrated to us, Yazid al-Raqashi narrated to us, from Anas, who said: We were sitting with the Prophet of Allah, may Allah bless him and grant him peace—and perhaps he said: sixty men—and he would narrate a hadith to us, then he would enter for his need. We would then repeat it among ourselves, this one and then that one, and we would stand up as if it had been sown into our hearts.