مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2429
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn 'Abbas (رضي الله عنه) that The Prophet (ﷺ) proposed to Maimoonah bint al-Harith; she appointed al-'Abbas as her guardian, and he gave her in marriage to the Prophet (ﷺ).
Musnad Ahmad 2441Hasan; this is a da'eef isnad]