Abu Hurayra
Born in al-Jabur, Arabia to the Banu Daws clan of the Zahran tribe, he was among the first people to accept Islam, and later became a member of the Suffah after the migration of Muhammad. Under the reign of the Rashidun caliph Umar, he also served as a scholar, hadith narrator, military governor of Bahrain, and soldier.
Acknowledged by Muslim scholars for his notable photographic memory, he memorized massive numbers of over 5,000 hadiths, which later produced more than 500,000 narrator chains, making him an example followed by Hadith scholars today. Provided by Wikipedia