Hazrat ‘Urwah bin Zubair (rahimahullah) narrates that a woman of the Banu Najjaar clan (viz. Hazrat Nawwaar bint Maalik, the mother of Hazrat Zaid bin Thaabit (radhiyallahu ‘anhuma)) said, “My house was situated at a high spot and was one of the highest houses around the Musjid (i.e. Musjidun Nabawi).
“Bilaal (radhiyallahu ‘anhu) would call out the azaan of Fajr from the top of my house so that his voice would reach far and wide. He would arrive at the time of Sehri and sit on the roof of my house, while looking at the horizon (and waiting for the time of Fajr to set in).
“When he would see the time set in, he would stand up and stretch his arms (due to him sitting for some while). He would then make the following dua: ‘O Allah, I praise You (for allowing me to call out the azaan) and I seek Your assistance (and beg You) to guide the Quraish (i.e. the family of Rasulullah (sallallahu ‘alaihi wasallam)) to Islam so that they may uphold and establish Your Deen (in the world). He would then call out the azaan.’”
She further mentioned, “I take a qasm by Allah Ta‘ala, I cannot remember him (Bilaal radhiyallahu ‘anhu) leaving out this dua for even a single night (i.e. his dua for the guidance of the Quraish).”(Sunan Abi Dawood #519)