Mukhtasar Bukhari (Abridged) 1497 — Description of the Prophet’s

Narrated from Ummul Momineen Aisha Siddiqa (may Allah be pleased with her) that the Noble Prophet (peace and blessings of Allah be upon him) used to speak in such a manner (calmly and with pauses) that if someone wanted to count (the words), they could count them.