A man came while the Messenger of Allah ﷺ was delivering a sermon and stood in the sun. The Prophet ﷺ ordered that he be moved into the shade.
حدثنا مسدد حدثنا يحيى عن إسمعيل قال
أنه جاء ورسول الله ﷺ يخطب فقام في الشمس فأمر به فحول إلى الظل
Sourcing, its isnad is sahih. Ahmad narrated it in 3/426 from Yahya Qattan through the same route, and Ibn Khuzayma graded it sahih, no. 1453, and see no. 3045.