مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2199
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn 'Abbas (رضي الله عنه) that the Messenger of Allah (ﷺ) said: "Jibreel (عليه السلام) said to me: Prayer has been made dear to you, so pray as much as you want."
Musnad Ahmad 2205Its isnad is da'eef]