“The Messenger of Allah one day said to his companions, ‘Condemned is every property that is not purified by paying al- Zakat (charity), condemned is the body that is not purified once in every forty days.’ He was then asked, ‘O Messenger of Allah, we know how property is purified, but what is al-Zakat (purification) of the bodies?’ The Messenger of Allah said, ‘It is the suffering of the body from certain forms of trouble.’ The narrator has said that the faces of those who heard it changed and when he noticed the change in their faces he asked them, ‘Did you understand what I meant by what I just said?’ They said, ‘No, O Messenger of Allah.’ He then said, ‘What I meant was that a man suffers a scratch or a set back, a slip, or illness, or is pricked by a spike or such other things.’ In his Hadith he also mentioned even sourness in the eyes.”