Shaikh Muhammad Bin Haadi (may Allaah preserve him) stated in ‘Al-Iqnaa’u Bimaa Jaa’a An A’immatid Da’wati Minal Aqwaali Fil Ittibaa’ page17:
Imaam Muhammad Bin Abdil Wahhaab (rahimahullaah) said regarding the statement of [Allaah (The Most High)]:
فَإِن تَنَازَعْتُمْ فِي شَيْءٍ فَرُدُّوهُ إِلَى اللَّهِ وَالرَّسُولِ إِ
(And) if you differ in anything amongst yourselves, refer it to Allah and His Messenger
When it is the case that Allaah [Glorified be He and free is He from all imperfections] has indeed obligated on us to refer back to Allaah concerning wherein we differ- that is (referring back our differing) to the Book of Allaah and to the Messenger – that is his Sunnah-; we know definitely (without any doubt) that the one who refers back to the Book and the Sunnah regarding what the people differ in, he will find in them (i.e. the Book and the Sunnah) that which will end the differing (i.e. the correct position will be established and the differing will end).
Abu Mu’aawiyah (Abdullah Al-Gambi)