Passage from
the Qur'an on deerskin ascribed to 'Umar ibn al Khattab, second Caliph,
(634-644AD)

...And remember
with gratitude God's favour on you; for ye were enemies and He joined your hearts
in love, so that by His Grace, ye became brethren; and ye were on the brink of the
pit of Fire, and He saved you from it. Thus doth God make His Signs clear to you:
That ye may be guided. Let there arise out of you a band of people inviting to...]
[Qur'an
3:103-104]