Qur'an 45:18

ثُمَّ جَعَلْنَـٰكَ عَلَىٰ شَرِيعَةٍ مِّنَ ٱلْأَمْرِ فَٱتَّبِعْهَا وَلَا تَتَّبِعْ أَهْوَآءَ ٱلَّذِينَ لَا يَعْلَمُونَ

“Then We put you, [O Muḥammad], on an ordained way concerning the matter [of religion]; so follow it and do not follow the inclinations of those who do not know.”

Al-Jaathiya 45:18 · Saheeh International