Mukhtasar Muslim

Sayyiduna Abu Darda (may Allah be pleased with him) narrates from the Noble Prophet (peace and blessings be upon him) that he said: "Is any one of you incapable of reciting one third of the Qur'an every night?" The companions asked, "How can anyone recite one third of the Qur'an?" He (peace and blessings be upon him) said: "Surah Al-Ikhlas (Qul Huwa Allahu Ahad) is equal to one third of the Qur'an."