(36) باب الدَّلِيلِ لِمَنْ قَالَ الصَّلاَةُ الْوُسْطَى هِيَ صَلاَةُ الْعَصْرِ
'Ali reported:
The Messenger of Allah (ﷺ) said on the day (of the Battle) of Ahzab: They diverted us from saying the middle prayer, i. e. the 'Asr prayer. May Allah fill their houses and graves with fire; he then observed this prayer between the evening prayer and the night prayer.
Reference: Sahih Muslim 627 f
In-book reference: Book 5, Hadith 261
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 1314