One of these spies...
One of these spies, a mawla from Syria, was given 3,000 dirhams and told to buy himself into the Shi'a organisation. The spy only made contact after Muslim's move. He went up to Muslim b. 'Awsaja al-Asadi in the mosque and asked how he could contribute 3,000 dirhams from his people in Syria to the Shi'a cause. The reason he gave for knowing that Muslim b. 'Awsaja was a Shi'a supporter was that he had heard people saying so in the mosque27 . By insisting on giving the money personally to Muslim b.
'Aqil the spy was able to infiltrate right into the heart of the Shi'a organisation. when 'Ubaid Allah thought he had enough information, he decided to act publicly. He pretended to notice that Hani' b. 'Urwa had been absent from his gatherings and he sent three tribal leaders to bring Hani' along as a friend. However when Hani' reached the governor's palace, 'Ubaid Allah accused him of plotting against him.
At first Hani' denied this but 'Ubaid Allah summoned the mawla and Hani' knew that he had been exposed. He offered to send Muslim away. However 'Ubaid Allah wanted Hani'to hand Muslim over but this Hani' refused to do. 'Ubaid Allah struck him brutally with a stick and had him imprisoned28 . At this point, it appears that Muslim b. 'Aqil's strength must have been great. 'Ubaid Allah did not try to arrest both men at Hani's house.
Obviously the reason was that this would have led to a conflict which 'Ubaid Allah was by no means sure of winning. Before Hani's arrest, Muslim had sent to al-Husayn urging him to come and telling him that affairs were going well in al-Kufa and that he had 18,000 pledges of allegiance29 . By pressing Hani' to hand over Muslim, 'Ubaid Allah was also trying to achieve his purpose by treachery without the use of force.
Two of the leaders who had brought Hani' were shocked at 'Ubaid Allah's deception in the way he had used them. One protested personally and was imprisoned. The other who belonged to Madhhij, the same clan as Hani', called out his tribesmen, who gathered outside the palace, demanding Hani"s release. 'Ubaid Allah sent out the qadi Shuraih who assured them that Hani' was al right. Satisfied that nothing was going to be done to one of their tribal leaders, Madhhij departed30 .
When news reached Muslim of what had happened to Hani', he decided to revolt immediately. He sent a messenger around to call out the people31 . The fact that this revolt was a spontaneous reaction to a situation did not augur well for its success.