Q 12:40

مَا تَعْبُدُونَ مِن دُونِهِۦٓ إِلَّآ أَسْمَآءً سَمَّيْتُمُوهَآ أَنتُمْ وَءَابَآؤُكُم مَّآ أَنزَلَ ٱللَّهُ بِهَا مِن سُلْطَـٰنٍ ۚ إِنِ ٱلْحُكْمُ إِلَّا لِلَّهِ ۚ أَمَرَ أَلَّا تَعْبُدُوٓا۟ إِلَّآ إِيَّاهُ ۚ ذَٰلِكَ ٱلدِّينُ ٱلْقَيِّمُ وَلَـٰكِنَّ أَكْثَرَ ٱلنَّاسِ لَا يَعْلَمُونَ

Translations

You worship not besides Him except [mere] names you have named them, you and your fathers, for which Allah has sent down no authority. Legislation is not but for Allah. He has commanded that you worship not except Him. That is the correct religion, but most of the people do not know.

Sahih International · EN

Vous n'adorez, en dehors de Lui, que des noms que vous avez inventés, vous et vos ancêtres, et à l'appui desquels Allah n'a fait descendre aucune preuve. Le pouvoir n'appartient qu'à Allah. Il vous a commandé de n'adorer que Lui. Telle est la religion droite; mais la plupart des gens ne savent pas.

Muhammad Hamidullah · FR

Tafsir

Joseph told them that they only worshipped names besides Allah, which have not been designated by Allah, but were what they and their ancestors had called gods – yet they had no share in divinity. Allah had sent no proof showing that giving these names was correct. The command in all creation is Allah’s alone, and does not belong to these names, which they and their ancestors had come up with. Allah, glory be to Him, has instructed that you worship Him alone, and has forbidden that you should associate others with Him. Worshipping Allah alone is the straight path, which has no deviation in it. Most people do not know this, and therefore they associate other things with Allah, worshipping some of what Allah has created.

Al-Mukhtasar fi Tafsir al-Quran · Tafsir Center for Quranic Studies

Read Ibn Kathir (Ibn Kathir (abridged, English))

"O two companions of the prison! Are many different lords (gods) better or Allah, the One, the Irresistible? (39)"You do not worship besides Him but only names which you have named (forged) - you and your fathers - for which Allah has sent down no authority. The command is for none but Allah. He has commanded that you worship none but Him; that is the straight religion, but most men know not. (40) Prophet Yusuf went on calling his two prison companions to worship Allah alone, without partners, and to reject whatever is being worshipped instead of Him like the idols, which were worshipped by the people of the two men, Yusuf said, أَأَرْبَابٌ مُّتَفَرِّقُونَ خَيْرٌ أَمِ اللَّهُ الْوَاحِدُ الْقَهَّارُ (Are many different lords (gods) better or Allah, the One, the Irresistible?) to Whose grace and infinite kingdom everything and everyone has submitted in humiliation. Prophet Yusuf explained to them next that it is because of their ignorance that they worship false deities and give them names, for these names were forged and are being transferred from one generation to the next generation. They have no proof or authority that supports this practice, hence his statement to them, مَّا أَنزَلَ اللَّهُ بِهَا مِن سُلْطَانٍ (for which Allah has sent down no authority) or proof and evidence. He then affirmed that the judgement, decision, will and kingdom are all for Allah alone, and He has commanded all of His servants to worship none but Him. He said, ذَٰلِكَ الدِّينُ الْقَيِّمُ (that is the straight religion,) 'this, Tawhid of Allah and directing all acts of worship at Him alone in sincerity, that I am calling you to is the right, straight religion that Allah has ordained and for which He has revealed what He wills of proofs and evidences,' وَلَٰكِنَّ أَكْثَرَ النَّاسِ لَا يَعْلَمُونَ (but most men know not.), and this is why most of them are idolators, وَمَا أَكْثَرُ النَّاسِ وَلَوْ حَرَصْتَ بِمُؤْمِنِينَ (And most of mankind will not believe even if you eagerly desire it.)[12:103] When Yusuf finished calling them, he started interpreting their dreams for them,

Arabic text: Tanzil (Uthmani). Translations: Sahih International (en), Muhammad Hamidullah (fr). tanzil.net