Patience
عَجَبًا لِأَمْرِ الْمُؤْمِنِ، إِنَّ أَمْرَهُ كُلَّهُ خَيْرٌ، وَلَيْسَ ذَاكَ لِأَحَدٍ إِلَّا لِلْمُؤْمِنِ، إِنْ أَصَابَتْهُ سَرَّاءُ شَكَرَ فَكَانَ خَيْرًا لَهُ، وَإِنْ أَصَابَتْهُ ضَرَّاءُ صَبَرَ فَكَانَ خَيْرًا لَهُ
Translation
Amazing is the affair of the believer, verily all of his affairs are good and this is not for no one except the believer. If something of good/happiness befalls him he is grateful and that is good for him. If something of harm befalls him he is patient and that is good for him.
Narrator
Suhaib
Source
Sahih Muslim
Muslim 2999