It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him): I heard the Messenger of Allah (peace and blessings be upon him) say on the day of the Battle of the Trench (Khandaq): "These polytheists distracted us from the middle prayer, that is, Asr. May Allah Almighty fill their bellies and their graves with fire."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2163