Hadith 680
´It was narrated that Mughirah bin Shu'bah said:` We were praying Zuhr with the Messenger of Allah at the time of intense heat (i.e., midday when the sun has just passed its zenith) and he said to us, "Wait for it to cool down before you pray, for intense heat is from the flaring up of the Hell-fire."
Hadith 2392
´It was narrated from 'Umar, meaning, from his father, his grandfather 'Umar, that :` he gave a horse in charity at the time of the Messenger of Allah (ﷺ), then he saw its owner selling it for a low price. He went to the Prophet (ﷺ) and asked him about that, and he said: “Do not buy what you gave in charity.”