Musnad Ahmad 696:0

Narrated Suhayb ibn Sinan from the tribe of Nimr ibn Qasit: The Messenger of Allah (ﷺ) said: "The affair of the believer is amazing; all of his affairs are good, and this is not for anyone except the believer. If something good happens to him, he is grateful, and that is good for him. And if something harmful happens to him, he is patient, and that is good for him."