[Pooya/Ali Commentary 20:2] Aqa Mahdi Puya says: According to the holy Imams (among the Ahl ul Bayt) the Holy Prophet used to worship Allah through prayers every night, almost all the night, for ten years. Refer to surah Muzzammil also. Then Allah sent down this verse to console him and his devout followers when the attitude of the disbelievers and the slow progress of the divine mission cast a gloom upon them. They prayed day and night for the triumph of the religion of Allah.