Final answer:
Muhammad said that the Quran was imprinted on his heart and mind. The Quran is the central religious text of Islam, believed to be a revelation from God to Prophet Muhammad.
Step-by-step explanation:
Muhammad, the prophet of Islam, said that the Quran was imprinted on his heart and mind. The Quran is the holy scripture of Islam, which Muslims believe was revealed to humanity by God through Muhammad. According to Muslim belief, Muhammad received his first revelations from the angel Gabriel in 610 CE while meditating in a cave outside of Mecca. These divine recitations were remembered and recited by Muhammad to his followers, as he was reportedly illiterate, and his companions later documented these words, which now make up the Quran.