Zayd ibn Arqam (may Allah be pleased with him) reported that he saw some people pray in the forenoon, so he said: "They know that praying at an hour other than this one is better, for the Messenger of Allah (may Allah's peace and blessings be upon him) said: 'The prayer of the oft-returning to Allah is when weaned camels are bitten by excessive heat.'" Authentic hadith - Narrated by Muslim