مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3076
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) was in Maimoonah's house, and I put some water for him to do wudoo’ at night. Maimoonah said to him: O Messenger of Allah, 'Abdullah bin ‘Abbas has put this for you. He said: "O Allah, grant him deep understanding of the faith and teach him the meaning of the Qur’an.”
Musnad Ahmad 3102Its isnad is saheeh, al Bukhari (143) and Muslim(2477)]