God created Reason, and it was the most beautiful being in his creation: and God said to it, “I have not created anything better or more perfect or more beautiful than thou: blessings will come down on mankind on thy account, and they will be judged according to the use they make of thee.”

Muhammad (AD c. 570–632) Arab religious, military, and political leader; founder of Islam [Mohammed, مُحَمَّد]

Hadith
    (Source)

In Syed Ameer Ali, A Critical Examination of the Life and Teachings of Mohammed (1873), cited to The Kitâb-ul-Mustarif, ch. 2, and The Mishkât, Bk 22, ch. 18, pt. 3 (from Abu Hurairah)