فَلا تَكُ في مِريَةٍ مِمّا يَعبُدُ هـٰؤُلاءِ ۚ ما يَعبُدونَ إِلّا كَما يَعبُدُ آباؤُهُم مِن قَبلُ ۚ وَإِنّا لَمُوَفّوهُم نَصيبَهُم غَيرَ مَنقوصٍ

So do not be in doubt, [O Muhammad], as to what these [polytheists] are worshipping. They worship not except as their fathers worshipped before. And indeed, We will give them their share undiminished.