الجاثية — Al-Jasiyah Ayat 18
ثُمَّ جَعَلْنٰكَ عَلٰى شَرِيْعَةٍ مِّنَ الْاَمْرِ فَاتَّبِعْهَا وَلَا تَتَّبِعْ اَهْوَاۤءَ الَّذِيْنَ لَا يَعْلَمُوْنَ
Ṡumma ja‘alnāka ‘alā syarī‘atim minal-amri fattabi‘hā wa lā tattabi‘ ahwā'al-lażīna lā ya‘lamūn(a).
"Then We put you, [O Muhammad], on an ordained way concerning the matter [of religion]; so follow it and do not follow the inclinations of those who do not know."