مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2122
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) said: "I was commanded to use the siwak until I thought - or l expected - that Qur'an would be revealed to me concerning it.”
Musnad Ahmad 2125Hasan because of corroborating evidence; this is a da’eef is