مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2727
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: The Prophet (ﷺ) fought an enemy, and he did not finish with them until he delayed 'Asr until after its time had passed. When he realized that, he said: "O Allah, those who kept us from the middle prayer, fill their houses with fire and fill their graves with fire," and words to that effect.
Musnad Ahmad 2745Its isnad is saheeh]