مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2760
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn 'Abbas (رضي الله عنه) that The Prophet sent his letter to Chosroes with a man and instructed him to give it to the ruler of Bahrain, and the ruler of Bahrain gave it to Chosroes. When he read it, he tore it up. He (the narrator) said: I think Ibn al-Musayyab said: The Messenger of Allah (ﷺ) prayed against them, that they would be utterly torn apart.
Musnad Ahmad 2780Its isnad is saheeh]