Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
darimi:446al-Ḥasan b. Bishr > al-Muʿāfá > al-Awzāʿī > Katab ʿUmar b. ʿAbd al-ʿAzīz ؒ Taʿālá

[Machine] "There is no opinion for anyone in the Book of Allah. Rather, the only opinion is that of the Imams regarding matters for which there is no book revealed, nor has a sunnah been passed down from the Messenger of Allah. And there is no opinion for anyone in a sunnah established by the Messenger of Allah."  

الدارمي:٤٤٦أَخْبَرَنَا الْحَسَنُ بْنُ بِشْرٍ حَدَّثَنَا الْمُعَافَى عَنِ الْأَوْزَاعِيِّ قَالَ «كَتَبَ عُمَرُ بْنُ عَبْدِ الْعَزِيزِ رَحِمَهُ اللَّهُ تَعَالَى

أَنَّهُ لَا رَأْيَ لِأَحَدٍ فِي كِتَابِ اللَّهِ وَإِنَّمَا رَأْيُ الْأَئِمَّةِ فِيمَا لَمْ يَنْزِلْ فِيهِ كِتَابٌ وَلَمْ تَمْضِ بِهِ سُنَّةٌ مِنْ رَسُولِ اللَّهِ ﷺ وَلَا رَأْيَ لِأَحَدٍ فِي سُنَّةٍ سَنَّهَا رَسُولُ اللَّهِ ﷺ»