Sunan an-Nasa'i
Sunan an-Nasa'i 5399
أَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنَا أَبُو عَامِرٍ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنِ الشَّيْبَانِيِّ، عَنِ الشَّعْبِيِّ، عَنْ شُرَيْحٍ، أَنَّهُ كَتَبَ إِلَى عُمَرَ يَسْأَلُهُ فَكَتَبَ إِلَيْهِ أَنِ اقْضِ بِمَا فِي كِتَابِ اللَّهِ فَإِنْ لَمْ يَكُنْ فِي كِتَابِ اللَّهِ فَبِسُنَّةِ رَسُولِ اللَّهِ صلى الله عليه وسلم فَإِنْ لَمْ يَكُنْ فِي كِتَابِ اللَّهِ وَلاَ فِي سُنَّةِ رَسُولِ اللَّهِ صلى الله عليه وسلم فَاقْضِ بِمَا قَضَى بِهِ الصَّالِحُونَ فَإِنْ لَمْ يَكُنْ فِي كِتَابِ اللَّهِ وَلاَ فِي سُنَّةِ رَسُولِ اللَّهِ صلى الله عليه وسلم وَلَمْ يَقْضِ بِهِ الصَّالِحُونَ فَإِنْ شِئْتَ فَتَقَدَّمْ وَإِنْ شِئْتَ فَتَأَخَّرْ وَلاَ أَرَى التَّأَخُّرَ إِلاَّ خَيْرًا لَكَ وَالسَّلاَمُ عَلَيْكُمْ.
It was narrated from Shuraih that he wrote to Umar with a question, and Umar wrote back: ‘Judge according to what is in the Book of Allah. If it is not in the Book of Allah, then judge according to the Sunnah of the Messenger of Allah. If it is in neither the Book of Allah nor the Sunnah of the Messenger of Allah, then judge according to what the righteous have ruled. If it is in neither the Book nor the Sunnah, and the righteous have not ruled on it, then you may proceed with your own judgment if you wish, or refrain if you wish. I think refraining is better for you. Peace be upon you.’