Sickness, Expiation of Sins:
Abu Hurairah RadhiyAllahu Ta’ala ‘Anhu narrates that the Nabi SallAllahu alaihi wa sallam said: “When Allah wants to be good to someone, He tries him with some hardship.”
Abu Hurairah RadhiyAllahu Ta’ala ‘Anhu also reports that Allah’s Messenger, peace be upon him, said:
“For every misfortune, illness, anxiety, grief, or hurt that afflicts a Muslim -even the hurt caused by the pricking of a thorn – Allah removes some of his sins.”
Abu Hurairah RadhiyAllahu Ta’ala ‘Anhu said:
“The Prophet, peace be upon him, remarked: ‘The example of a believer is like a fresh tender plant; from whichever direction the wind blows, it bends the plant.
But when the wind dies down, it straightens up again. (Similarly a believer is tested by afflictions to strengthen his faith and heart, and he remains patient and firm).
And an evil person is like a pine tree which remains hard and stiff until Allah breaks it whenever He wills.”