One day, the Holy Prophet (s.a.w.) raised his head towards the heavens and then laughed. One of his companions asked him the reason for his laughter to which the Prophet (s.a.w.) replied saying:
“My laughter was out of my astonishment. Two angels had descended from the heavens to record the deeds of a righteous Mu’min. They always found him on his prayer mat, engaged in worship, but this time, they noticed that he was not there. He was in his bed, having been afflicted with sickness. They ascended towards the heavens and said to God: O’ Lord! We did not find Your servant in his usual place of worship but instead, found him lying on his bed in a state of sickness.
God said to them: Until he regains his health, record for him all acts of worship and deeds of goodness that he used to perform when healthy. It is necessary for Us, for as long as he remains in the captivity (of sickness), to grant him rewards of all the good deeds that he used to perform, when possessing soundness of health”( Daastaan-ha Wa Pand-ha, vol. 6, pg. 130; Tafsir Nur al-Thaqalain, vol. 5, pg. 68.)