11:110
وَلَقَدْ ءَاتَيْنَا مُوسَى ٱلْكِتَٰبَ فَٱخْتُلِفَ فِيهِ ۚ وَلَوْلَا كَلِمَةٌۭ سَبَقَتْ مِن رَّبِّكَ لَقُضِىَ بَيْنَهُمْ ۚ وَإِنَّهُمْ لَفِى شَكٍّۢ مِّنْهُ مُرِيبٍۢ
And We had certainly given Moses the Scripture, but it came under disagreement. And if not for a word that preceded from your Lord, it would have been judged between them. And indeed they are, concerning the Qur'an, in disquieting doubt.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
Associating Partners with Allah is no doubt Misguidance
Allah, the Exalted, says,
فَلاَ تَكُ فِى مِرْيَةٍ مِّمَّا يَعْبُدُ هَـؤُلاءِ
(So be not in doubt as to what these people worship.) This refers to the polytheists. Verily, what they are doing is falsehood, ignorance and misguidance. Verily, they are only worshipping what their fathers worshipped before. This means that they have no support for their Shirk. They are only mimicking their fathers in ignorance. Therefore, Allah will give them due recompense for that and He will punish them with a punishment the likes of which none can give besides Him. If they did any good deeds, then Allah will reward them for those good works in this life, before the life of the Hereafter. Concerning Allah's statement,
وَإِنَّا لَمُوَفُّوهُمْ نَصِيبَهُمْ غَيْرَ مَنقُوصٍ
(And verily, We shall repay them in full their portion without diminution.) `Abdur-Rahman bin Zayd bin Aslam said, "We will pay them in full their portion of punishment without diminution." Then, Allah mentions that He gave Musa the Book, but the people differed concerning it. Some believed in it and some disbelieved in it. Therefore, you, Muhammad, have an example in the Prophets who came before you. So do not grieve or be upset by their denial of you.