Sayyiduna Zayd bin Arqam (may Allah be pleased with him) says: The Messenger of Allah (peace and blessings be upon him) said: "The prayer of the Awabeen is at the time when the feet of the young camels begin to burn from the heat." The meaning of the feet burning is that the Duha prayer should be delayed until the ground becomes hot enough to burn the feet of the young camels, while they are still small.