Hadith 17:656
Waki' narrated to us, from Shu'bah, from Qatadah, who said: The Messenger of Allah (may Allah bless him and grant him peace) forbade that a man should sit between the shade and the sun.
حدثنا وكيع عن شعبة عن قتادة قال نهى رسول الله صلى الله عليه وسلم أن يقعد الرجل بين الظل والشمس