Sunan Ibn Majah
Sunan Ibn Majah 222
حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا الْوَلِيدُ بْنُ مُسْلِمٍ، حَدَّثَنَا رَوْحُ بْنُ جَنَاحٍ أَبُو سَعْدٍ، عَنْ مُجَاهِدٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ " فَقِيهٌ وَاحِدٌ أَشَدُّ عَلَى الشَّيْطَانِ مِنْ أَلْفِ عَابِدٍ " .
Unreviewed translation. All hadiths in this collection are available in five languages. Titles and introductions may remain in Arabic.
Hisham ibn Ammar reported to us: al-Walid ibn Muslim reported to us: Rawh ibn Janah Abu Sad reported to us, from Mujahid, from Ibn Abbas, who said: The Messenger of Allah (Allah bless him and grant him peace) said, ‘One jurist is more formidable to Satan than a thousand devoted worshippers.’
Notes and open questions — unreviewed
The Arabic says faqih (a scholar/jurist), while the English witness supplies an explanatory gloss ‘knowledgeable man.’