Hadith 2084
When Tharid was brought to Lady Asma bint Abi Bakr (may Allah be pleased with them), she would order that it be covered until its steam and heat subsided (i.e., until it cooled down), and she would say: I heard the Messenger of Allah (peace and blessings be upon him) say, "This (i.e., eating after cooling) is a cause of much blessing."