Mukhtasar Bukhari

Narrated from Sayyiduna Abu Musa (may Allah be pleased with him) that the Prophet Muhammad (peace and blessings be upon him) said: I recognize the voices of the Ash‘ari people when they recite the Qur’an in their homes at night in Madinah, and by the sound of their recitation at night I recognize their dwellings, even though I have not seen the places where they stayed during the day. And among them is a wise man, that when he meets the cavalry of the disbelievers or the enemy, he says to them: My companions command you to wait (to fight) for them.