Mukhtasar Bukhari

Umm al-Mu'mineen Aisha (may Allah be pleased with her) says in another narration that the Prophet Muhammad (peace and blessings be upon him) performed the Tahajjud prayer in my house, then he heard the voice of 'Abbad (may Allah be pleased with him) who was praying in the mosque. So the Prophet (peace and blessings be upon him) said: "O Aisha! Is this the voice of 'Abbad?" I replied, "Yes." Then he said: "O Allah, have mercy on 'Abbad."