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]