Refer Any Differing to Allāh and His Messenger

Shaykh Ṣāliḥ al-Fawzān (may Allāh preserve him) stated:

Nowadays the phenomenon that has emerged (with some people) is their saying: ‘It’s a controversial issue’. We say, when there is a difference of opinion, the proof should be followed, we should not worship (Allah) with people’s disagreements and views. We worship (Allah) through (following) the proof. So we should refer the disagreement to the proof. Whatever is supported by the proof is the truth and whatever is contrary to the proof is falsehood. Allah has not left us to the views, sayings and disagreement. Rather He says:

فَإِن تَنَازَعْتُمْ فِي شَيْءٍ فَرُدُّوهُ إِلَى اللَّـهِ وَالرَّسُولِ
(And) if you differ in anything amongst yourselves, refer it to Allah and His Messenger (Soorah an-Nisa:59)

Also He says:

وَمَا اخْتَلَفْتُمْ فِيهِ مِن شَيْءٍ فَحُكْمُهُ إِلَى اللَّـهِ ۚ ذَٰلِكُمُ اللَّـهُ رَبِّي عَلَيْهِ تَوَكَّلْتُ وَإِلَيْهِ أُنِيبُ
And in whatsoever you differ, the decision thereof is with Allah (He is the ruling Judge). (And say O Muhammad to these polytheists:) Such is Allah, my Lord in Whom I put my trust, and to Him I turn in all of my affairs and in repentance.

(Soorah ash-Shura:10)

It is therefore obligatory to refer to the Book of Allah and the Sunnah of His Messenger (sallallaahu alayhi wa sallam), and to take whatever is supported by the proof while abandoning whatever is contrary to it. As for he who accepts the view that is in conformity with his inclination and desires, even when such is contrary to the proof, such a person is astray as he worships his desires. As for the one who worships Allah, he accepts whatever is supported by the proof from Allah’s Book and the Sunnah of His Messenger (sallallaahu alayhi wa sallam).

Source: A Gift to the Reader in Annotation of Sharh as-Sunnah: Volume 1, pp. 134-135