Verse 109

فَلَا تَكُ فِى مِرْيَةٍ مِّمَّا يَعْبُدُ هَـٰٓؤُلَآءِ مَا يَعْبُدُونَ إِلَّا كَمَا يَعْبُدُ ءَابَآؤُهُم مِّن قَبْلُ وَإِنَّا لَمُوَفُّوهُمْ نَصِيبَهُمْ غَيْرَ مَنقُوصٍ

Therefore, do not be in doubt about what these people worship. They do not worship except what their parents worshiped before them.  And indeed We will exact their share without deficiency.