مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2564
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) used to pause to breathe twice (when drinking).
Musnad Ahmad 2578Saheeh, because of corroborating evidence and its isnad is d