مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3804
Musnad of Abdullah bin Mas'ood
It was narrated that Ibn Mas'ood (رضي الله عنه) said: I saw the Prophet (ﷺ) eating meat, then he got up to pray and he did not touch a drop of water.
Musnad Ahmad 3827Saheeh; this is a da'eef isnad because it is interrupted. It