The Du‘aa of Rasulullah (sallallahu ‘alaihi wasallam):

Hazrat Qais bin Abi Haazim (rahimahullah) narrates that Hazrat Sa’d (radhiyallahu ‘anhu) mentioned, “Rasulullah (sallallahu ‘alaihi wasallam) made du‘aa saying, ‘O Allah! Accept the du‘aa of Hazrat Sa’d (radhiyallahu ‘anhu) when he supplicates to you!’”(Sunan Tirmizi #3751)