صحيح البخاري
Sahih Bukhari
كتاب الاعتصام بالكتاب والسنة
The Book of Holding Fast To The Qur’An and The Sunna
باب إذا اجتهد العامل أو الحاكم فأخطأ خلاف الرسول من غير علم، فحكمه مردود:
Chapter. If a governor or a ruler gives a verdict based on his opinion and the verdict proves to be wrong and disagrees with the verdict of Allah’s Messenger (p.b.u.h.), but he is unaware of that; then his verdict will be rejected.