When one studies the history of the Hadiths, one finds that several of the most important characters or persons in the life of Muhammad are missing from the reported and alleged stories about Muhammad by his companions, wives and other contemporaries.
The most important are Khadijah his wife, Bilal the public reciter of the Quran who accompanied him almost every where, his other wives and 'mothers of the believers' especially Safiya the Jewess.
The reason why Bilal is missing is because of the blatant and institutional RACISM of the Arabs towards the African Blacks whom they call in the Arabic language ABEED meaning SLAVES.
There are only a handful of reports attributed to Bilal in all of the Ahadith, not one of which is of importance.
Sunan of Abu-DawoodHadith 534Narrated byBilal
The Apostle of Allah (peace be upon him) said to Bilal: Do not call adhan until the dawn appears clearly to you in this way, stretching his hand in latitude.
Sunan of Abu-DawoodHadith 1252Narrated byBilal
Ziyadah al-Kindi reported on the authority of Bilal that he (Bilal) came to the Apostle of Allah (peace be upon him) to inform him about the dawn prayer. Aisha kept Bilal engaged in a matter which she asked him till the day was bright and it became fairly light. Bilal then stood up and called him to prayer and called him repeatedly. The Apostle of Allah (peace be upon him) did not yet come out. When he came out, he led the people in prayer and he (Bilal) informed him that Aisha had kept him engaged in a matter which she asked him till it became fairly light; hence he became late in reaching him (in time). He (Bilal) said: Apostle of Allah, the dawn became fairly bright. He said: If the dawn became brighter than it is now, I would pray them (the two rak'ahs of the sunnah prayer), offer them well and in a more beautiful manner.
Al-Tirmidhi HadithHadith 646Narrated byBilal
Allah's Messenger (peace be upon him) said to me: Don't pronounce these words, `Prayer is better than sleep ' in the call for prayer, but for the dawn prayer only.