No Grain from Yamamah

In Makkah, Thumamah said the words of Islam out loud while performing 'umrah. The Quraysh, hearing him, asked whether he had become a Sabi', one who abandons his religion. He answered, "No. I have become Muslim with Muhammad, the Messenger of Allah." Then he told them that not a grain of wheat would come to them from Yamamah unless the Prophet ﷺ allowed it. Yamamah was the granary on which Makkah relied.

The Quraysh were struck by the loss and wrote to the Prophet ﷺ, appealing to the ties of kinship. He wrote to Thumamah and told him to let the grain pass. The Prophet ﷺ here showed that his mercy applied to his enemies as well, and that economic pressure was not a tool he wished to use on the weak.

After the Prophet's ﷺ death, his people in Banu Hanifah followed Musaylimah, who claimed prophecy. Thumamah held to Islam and urged them to leave the false claim, and went with the Muslims against those who had apostatised. The reports differ over where he died, and the date is not recorded.