The Qur'an

Allah, the Exalted, sent down the Divine Revelation to the Messenger of Allah (may Allah's peace and blessings be upon him) abundantly during the period preceding his death until he died at a time when the revelation had never been more abundant

Anas ibn Mālik (may Allah be pleased with him) reported: Allah, Exalted and Glorified, sent down the Divine Revelation to the Messenger of Allah (may Allah's peace and blessings be upon him) abundantly during the period preceding his death until he died at a time when the revelation had never been more abundant.