3-44 Muhammad ibn al-Hassan - may God be pleased with him - narrated that Abdullah ibn Ja’far al-Homayry quoted Ahmad ibn Muhammad ibn Isa, on the authority of Abu Yahya Sohail ibn Zyad al-Vaseti who linked it up with a chain of narrators to the Commander of the Faithful Imam Ali (MGB),

“There are three problems in getting exposed to the sun. It causes water to evaporate; it will darken the skin; wear out clothing and make hidden pains apparent.”