The hadith narrated by Abu Huraira mentions that the luckiest person who will gain Prophet Muhammad's intercession on the Day of Resurrection is the one who sincerely believes in the oneness of Allah. Additionally, Umar bin Abdul Aziz wrote a letter to Abu Bakr bin Hazm, urging him to seek and write down hadiths, circulate knowledge, and teach the ignorant because knowledge does not vanish except when it is kept secretly.