For some unexplained reason, they believed that if a sick person entered the pool when the waters were agitated, he would be miraculously cured.
فَكَانَ ٱلْمَرْضَى مُثْقَلِينَ بِٱلْغَمِّ وَٱلْيَأْسِ وَٱلْإِحْبَاطِ .‏