6:150
قُلْ هَلُمَّ شُهَدَآءَكُمُ ٱلَّذِينَ يَشْهَدُونَ أَنَّ ٱللَّهَ حَرَّمَ هَٰذَا ۖ فَإِن شَهِدُوا۟ فَلَا تَشْهَدْ مَعَهُمْ ۚ وَلَا تَتَّبِعْ أَهْوَآءَ ٱلَّذِينَ كَذَّبُوا۟ بِـَٔايَٰتِنَا وَٱلَّذِينَ لَا يُؤْمِنُونَ بِٱلْءَاخِرَةِ وَهُم بِرَبِّهِمْ يَعْدِلُونَ
Say, [O Muhammad], "Bring forward your witnesses who will testify that Allah has prohibited this." And if they testify, do not testify with them. And do not follow the desires of those who deny Our verses and those who do not believe in the Hereafter, while they equate [others] with their Lord.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
A False Notion and its Rebuttal
Here Allah mentioned a debate with the idolators, refuting a false notion they have over their Shirk and the things that they prohibited. They said, surely, Allah has full knowledge of the Shirk we indulge in, and that we forbid some kinds of wealth. Allah is able to change this Shirk by directing us to the faith, - they claimed - and prevent us from falling into disbelief, but He did not do that. Therefore - they said Allah indicated that He willed, decided and agreed that we do all this. They said,
لَوْ شَآءَ اللَّهُ مَآ أَشْرَكْنَا وَلاَحَرَّمْنَا مِن شَىْءٍ
("If Allah had willed, we would not have taken partners (in worship) with Him, nor would our fathers, and we would not have forbidden anything.") Allah said in another Ayah,
وَقَالُواْ لَوْ شَآءَ الرَّحْمَـنُ مَا عَبَدْنَـهُمْ
(And they said: "If it had been the will of the Most Gracious (Allah), we should not have worshipped them (false deities)") 43:20. Similar is mentioned in Surat An-Nahl. Allah said next,