The Messenger of Allah ﷺ said, "How remarkable is the affair of the believer. All of his affairs are good, and this is not the case for anyone except the believer. If something pleasing happens to him, he is grateful, and that is good for him. If something harmful befalls him, he is patient, and that is good for him."
قال رسول الله ﷺ: عجبا لأمر المؤمن، إن أمره كله خير، وليس ذاك لأحد إلا للمؤمن، إن أصابته سراء شكر، فكان خيرا له، وإن أصابته ضراء صبر، فكان خيرا له.