Surah Ash-Shuraa 42:15

فَلِذَٰلِكَ فَٱدْعُ ۖ وَٱسْتَقِمْ كَمَآ أُمِرْتَ ۖ وَلَا تَتَّبِعْ أَهْوَآءَهُمْ ۖ وَقُلْ ءَامَنتُ بِمَآ أَنزَلَ ٱللَّهُ مِن كِتَـٰبٍ ۖ وَأُمِرْتُ لِأَعْدِلَ بَيْنَكُمُ ۖ ٱللَّهُ رَبُّنَا وَرَبُّكُمْ ۖ لَنَآ أَعْمَـٰلُنَا وَلَكُمْ أَعْمَـٰلُكُمْ ۖ لَا حُجَّةَ بَيْنَنَا وَبَيْنَكُمُ ۖ ٱللَّهُ يَجْمَعُ بَيْنَنَا ۖ وَإِلَيْهِ ٱلْمَصِيرُ

So to that [religion of Allāh] invite, [O Muḥammad], and remain on a right course as you are commanded and do not follow their inclinations but say, "I have believed in what Allāh has revealed of scripture [i.e., the Qur’ān], and I have been commanded to do justice among you. Allāh is our Lord and your Lord. For us are our deeds, and for you your deeds. There is no [need for] argument between us and you. Allāh will bring us together, and to Him is the [final] destination."

Translation: Saheeh International

Tafsir

So to that then to that affirmation of God’s Oneness summon O Muhammad (s) people and be upright in summoning them to this just as you have been commanded and do not follow them in their desires to abandon it. And say ‘I believe in whatever Book God has revealed. …

Excerpt from Tafsir al-Jalalayn, commentary on 42:15, via Quran.com. The reader has the full commentary and 9 more tafsirs.