What Happened to the Dawa of the Prophet Sallam?

The boycott probably lasted two or three years and a number of incidents are happened that brought about its conclusion the first of these is that the Prophet sallam made a Dawa against them. The second incident is that some of the people of Khwareish whose hearts were softer decided that they should do something to break the pact. Hisham ibn Amr felt that he needed to do something so he called his friend Zuhayir Ibn Abi Umeimah who said what can we do to bring about an end to this boycott. He laid out a plan tomorrow when all of the people  were in the gathering of the Quraysh and the Nadi in the parliament