Until now, many people from the tribes of Aus and Khazraj still stood firm upon polytheism. The victory of Badr resulted in a movement among these people and upon witnessing this magnificent and extraordinary victory, many people from among them became convinced of the truth of Islām. Thereafter, the element of idol worship began to diminish very rapidly in Madīnah. However, there were also some in whose hearts this victory of Islām had sparked a fire of rancour and jealousy. Finding it unwise to oppose openly, apparently they accepted Islām, but from the inside they sought to uproot it and joined the party of the hypocrites. The most prominent among the latter class of people was ‘Abdullāh bin Ubayy bin Sulūl, who was a very renowned chieftain of the Khazraj tribe. Due to the arrival of the Holy Prophet(sa) to Madīnah, he had already suffered the shock of having his leadership taken from him. After Badr, this individual became a Muslim at the outset, but his heart was satiated with malice and enmity towards Islām. He became the leader of hypocrisy and secretly began to hatch a series of conspiracies against Islām and the Holy Prophet(sa). As such, it shall become evident from events, which unfolded hereafter that on certain occasions, this individual became a means of creating very delicate situations for Islām.