Ibrahim bin Sulaiman, al-Mu'adab إبراهيم بن سليمان أبو إسماعيل المؤدب · Chapters on Hajj Rituals

“There is no Muhrim (pilgrim in Ihram) who exposes himself to the sun all day for the sake of Allah, reciting the Talbiyah until the sun goes down, but his sins will disappear and he will go back like on the day his mother bore him.”