Authentic Supplication Number 113.

Ibn `Abbas ┬ásaid: “I used to know the end of the Prophet ‘s prayer by the takbeer”

‘Al-‘Adawee said it was sound, and that it was reported by Bukhari, page 325 of volume 2 of Fath Al-Baree; Muslim, page 83 of volume 5; Abu Dawood, page 609 of volume 1; An-Nisa’ee, page 67 of volume 3; and Abu ‘Uwanah, page 264 of volume 2.