It is narrated from Shutayr bin Shakal al-Absi: I heard Ali bin Abi Talib (may Allah be pleased with him) say: On the day of the Battle of the Confederates (al-Ahzab), we offered the Asr prayer between Maghrib and Isha, and he (peace and blessings be upon him) said: "These polytheists kept us busy from the middle prayer, that is, the Asr prayer. May Allah fill their graves and their bellies with fire."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2161