Silsilat al-Ahadith al-Sahihah

Qasim Shaybani says that Sayyiduna Zayd bin Arqam (may Allah be pleased with him) saw some people performing the Duha prayer and said: Beware! Indeed, these people know that it is better to perform this prayer at a later time (i.e., after delaying it). Verily, the Messenger of Allah (peace and blessings be upon him) said: "The prayer of the Awabeen (those who turn to Allah) is when the feet of the young camels begin to burn from the intensity of the heat."