Analysis of information sources in references of the Wikipedia article "Second pledge at al-Aqabah" in English language version.
The second Pledge of Al-'Aqabah (the pledge of war) was: "Blood is blood and blood not to be paid for is blood not to be paid for. I am of you and you are of me. I will war against them that war against you, and be at peace with those and peace with you.
