Sahih Bukhari
Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)
Volume: 005 / Book Number: 059 / Hadith Number: 715
Narrated 'Aisha:
I heard the Prophet and listened to him before his death while he was Lying supported on his back, and he was saying, "O Allah! Forgive me, and bestow Your Mercy on me, and let me meet the (highest) companions (of the Hereafter)." See the Qur'an (4.69) and See Hadith No. 719.