مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3260
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn ‘Abbas (رضي الله عنه) said: The Messenger of Allah (ﷺ) got married when he was in ihram.
Musnad Ahmad 3283Its isnad is saheeh]