Posted on 06/30/2012 by __socrates

SAFF. صف
An even row or line of things.
(1) A. term used for a row of persons standing up for prayers.
(2) As-Saff, the title of the LXIth Surah of the Qur’an, in the 6th verse of which the word occurs for the close unbroken line of an army.

Based on Hughes, Dictionary of Islam