Abu Hurairah narrates that the Prophet, peace be upon him, said: “When Allah wants to be good to someone, He tries him with some hardship.”
Abu Hurairah 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.” Ibn Mas’ud said: “I visited the Messenger of Allah, peace be upon him,
while he had a fever. I exclaimed: ‘O Messenger of Allah! You have a high
fever! ‘ He said: ‘My fever is as much as two among you [might have]. ‘ I
asked: ‘Is it because you have a double reward?’ He replied: ‘Yes, that is right.
No Muslim is afflicted with any hurt, even if it is no more than the pricking of a
thorn, but Allah wipes off his sins because of it and his sins fall away from him
as leaves fall from a tree‘.”
Abu Hurairah (r) 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.”
Source: Fiqh-us-Sunnah, volume 4, #1
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Abu Hurairah (r) related that the Prophet (s) said, “When one of you is afflicted with any misfortune he should say, ‘Ina li llahi wa inna ‘ilayhi Raji’un (We are for Allah, and to Him is our return),’ even if it be merely losing one’s shoe straps, for this is also a misfortune.” (Ibn As-Sinni)
Abu Hurairah (r) reported that the Prophet, peace be upon him, said, “A strong believer is better and dearer to Allah than a weak believer, and there is good in everyone, but cherish what gives you benefit in the Hereafter and seek help from Allah and do not lose heart, and if anything (in the form of trouble) comes to you, don’t say, ‘If I had not done that, such and such thing would not have happened,’ but say, ‘Allah has ordained it so, and whatever He pleases He does,’ because ‘ifs’ and ‘buts’ open the door for Satan.”(Muslim)
Source: Fiqh-us-Sunnah, Volume 4, #132.
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رَبَّنَا آتِنَا فِي الدُّنْيَا حَسَنَةً وَفِي الآخِرَةِ حَسَنَةً وَقِنَا عَذَابَ النَّارِ