Hundred Greatest Muslims of All Time   '' It is incumbent upon every Muslim to gain knowledge . An illiterate person can not be a good Muslim . In Islam , gaining and spreading knowledge is a big worship and the value of the ink of a scholar's pen and that of the blood of a martyr will be the same on the day Judgement . A Muslim has a share from the rewards of the people whom he teaches good things without deducting their rewards . He has also a share from the punishment of the people whom he teaches evil things without deducting their punishment . The first word of the Quran revealed to the prophet Muhammad ﷺ was ' Read ' . Therefore, a Muslim must read the holy Quran , the Ahadith , the Islamic history , Islamic Sciences besides gaining prevalent areas of knowledge. A blind person and a seeing person are not equal. Likewise , a literate Muslim and an illiterate Muslim are not equal . In fact , the sleep of an Alim [ Muslim scholar ] is better than the nightly w