The Qur'an
The Qur'an is revealed as a guide for the people of the fearful in accordance with the first verse of the surah al-Baqarah, and the Qur'an can be a reward in accordance with the words of Rasullulah that it is often the Qur'an and honey.
However, reading the verses of the Qur'an are of course many rewards and every reward of Allah is rewarded by good, such as this surah al-Waqiah where many hadiths of the Prophet described the priorities and priorities of Surah al-Waqiah.