مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2236
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: Revelation came to the Prophet (ﷺ) when he was forty years old; he was in Makkah for thirteen years and in Madinah for ten years, and he died when he was sixty-three years old.
Musnad Ahmad 2242Its isnad is saheeh]