It is narrated from Abu al-Malih that we were with Sayyiduna Buraydah (may Allah be pleased with him) on a military expedition. That day the sky was overcast with clouds. He said: Offer the Asr prayer early, for the Prophet (peace and blessings be upon him) said: "Whoever abandons the Asr prayer, his deeds are nullified."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2090