It is narrated from Sayyiduna Ali (may Allah be pleased with him) that on the day of the Battle of the Trench, the Prophet (peace and blessings be upon him) said: "May Allah fill their houses and graves with fire, for they did not let us perform the Asr prayer until the sun had set."
Hadith Referenceمسند احمد / مسند الخلفاء الراشدين / 1134
Hadith Gradingحکم دارالسلام:إسناده صحيح، خ: 4533، م : 627