CC Ādi 16.5

śata śata śiṣya saṅge sadā adhyāpana
vyākhyā śuni sarva-lokera camakita mana
Synonyms: 
śata śata — very many; śiṣya — disciples; saṅge — along with Him; sadā — always; adhyāpana — studying; vyākhyā — explanation; śuni — hearing; sarva-lokera — of all people; camakita — astonished; mana — minds.
Translation: 
As soon as the Lord became a teacher, many, many students came to Him, every one of them astonished to hear His mode of explanation.