Abu Dawud Book 19, Hadith Number 3646.

Narated By Narrated’Urwah : Abu Hurairah sat besides the apartment of ‘Aisha while she was praying. He then began to say: Listen, O lady of the apartment, saying twice. When she finished her prayer, she said: Are you not surprised at him and his narration of traditions? When the Apostle of Allah (PBUH) gave a talk, a man would count it if he wished to count.