حَدَّثَنَا مُسَدَّدٌ، قَالَ: حَدَّثَنَا يَحْيَى، قَالَ: حَدَّثَنَا إِسْمَاعِيلُ بْنُ أَبِي خَالِدٍ قَالَ: حَدَّثَنِي قَيْسٌ، عَنْ أَبِيهِ
أَنَّهُ جَاءَ وَرَسُولُ اللهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَخْطُبُ، فَقَامَ فِي الشَّمْسِ، فَأَمَرَهُ فَتَحَوَّلَ إِلَى الظِّلِّ
His father arrived while the Messenger of Allah (sallallahu alayhi wa sallam), may Allah bless him and grant him peace, was speaking. He stood in the sun and the Prophet (sallallahu alayhi wa sallam) told him to move to the shade.
Al-Adab Al-Mufrad 1177, Book 47, Behaviour with people, Hadith 22. 1 min read