When the series of battles known as Harb-ul-Fujjaar drew to an end in Shawwaal, then an unsteady revival of Hilf-ul-Fudhool commenced in the sacred month of Zul-Qa’dah.
The first person to revive this pact was Zubair bin ‘Abdul Muttalib. The Banu Haashim and Banu Taym gathered in the home of ‘Abdullah bin Jud‘aan who had prepared food for all present. At that time, everybody present pledged to assist the oppressed. Whether the oppressed was related or unrelated in kinship, a local or foreigner, they undertook to assist him to the best of their ability.
Rasulullah (sallallahu ‘alaihi wasallam) says, “On the occasion of this pledge, I was also present at the home of ‘Abdullah bin Jud‘aan. Even if I were offered red camels in exchange of this pledge, I would never accept. Now, even in the era of Islam, if I were called to join in a pledge of this nature, I would definitely agree to join.”
(Extracted from Seeratul Mustafa 1/94-95)
