Riyad as-Salihin (The Meadows of the Righteous)
by Imam Nawawi
239. Chapter: The excellence of worship in times of violent turbulence, which is confusion, civil strife and the like
1366. Ma'qil ibn Yasar reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "Worship in a time of violent turbulence is like emigration to me." [Muslim]
