Du‘aa for the Guidance of Quraish:

Hazrat ‘Urwah bin Zubair (rahimahullah) narrates that a woman of the Banu Najjaar clan (radhiyallahu ‘anha) said, “My house was one of the highest houses around the Musjid (i.e. Musjidun Nabawi (sallallahu ‘alaihi wasallam). Hadhrat Bilaal (radhiyallahu ‘anhu) would call out the azaan of Fajr from the top of my house. He would arrive at the time of Sehri and sit on the roof, looking at the horizon and waiting for the time of Fajr to set in. When he would see the time set in, he would stretch (due to sitting for a long time, waiting to see the time of Fajr set in) and make the following du‘aa: ‘O Allah, I praise You (for allowing me to call out the azaan) and I seek Your assistance and beseech You to guide the Quraish (i.e. the family of Rasulullah (sallallahu 'alaihi wasallam) who had not yet embraced Islam) to Islam so that they may uphold and establish Your Deen (in the world).’” The woman further said, “He would then call out the azaan. I take a qasm by the name of Allah Ta‘ala, I cannot remember him leaving out this du‘aa for even a single day (i.e. his du‘aa for the Quraish before calling out the azaan).”

(Abu Dawood #519)

Footsteps in Jannah:

Hazrat Abu Hurairah (radhiyallahu ‘anhu) narrates that Nabi (sallallahu ‘alaihi wasallam) once asked Hazrat Bilaal (radhiyallahu ‘anhu) at the time of fajr salaah, “O Bilaal (radhiyallahu ‘anhu)! After embracing Islam, which action do you hope will greatly benefit you from the actions you carry out? Verily I heard your footsteps before me in Jannah (in a dream) last night.” Hazrat Bilaal (radhiyallahu ‘anhu) replied, “The action I carry out, which I hope will greatly benefit me, is that whenever I make wudhu, at any time of the day or night, I perform salaah after making wudhu (I perform the salaah of Tahiyyatul Wudhu).”

(Muslim #2458)

The honor awarded to Hazrat Bilaal (radhiyallahu ‘anhu) on account of this action (tahiyyatul wudhu) was the honor of walking before Nabi (sallallahu ‘alaihi wasallam) in Jannah, as a khaadim (servant) walks in front of his master in order to serve him.