Al-An'am 6:121 ولا تاكلوا مما لم يذكر اسم الله عليه وانه لفسق وان الشياطين ليوحون الى اوليايهم ليجادلوكم وان اطعتموهم انكم لمشركون ١٢١
وَلَا
تَأۡكُلُواْ
مِمَّا
لَمۡ
يُذۡكَرِ
ٱسۡمُ
ٱللَّهِ
عَلَيۡهِ
وَإِنَّهُۥ
لَفِسۡقٞۗ
وَإِنَّ
ٱلشَّيَٰطِينَ
لَيُوحُونَ
إِلَىٰٓ
أَوۡلِيَآئِهِمۡ
لِيُجَٰدِلُوكُمۡۖ
وَإِنۡ
أَطَعۡتُمُوهُمۡ
إِنَّكُمۡ
لَمُشۡرِكُونَ
١٢١
Eat not (O believers) of that (meat) on which Allâh’s Name has not been pronounced (at the time of the slaughtering of the animal), for sure it is Fisq (a sin and disobedience of Allâh). And certainly, the Shayâtîn (devils) do inspire their friends (from mankind) to dispute with you, and if you obey them1 [by making Al-Maitah (a dead animal) legal by eating it], then you would indeed be Mushrikûn (polytheists); [because they (devils and their friends) made lawful to you to eat that which Allâh has made unlawful to eat and you obeyed them by considering it lawful to eat, and by doing so you worshipped them; and to worship others besides Allâh is polytheism].
Read Tafsir
Ibn Kathir (Abridged)
The Prohibition of what was Slaughtered in other than Allah's Name
This Ayah is used to prove that slaughtered animals are not lawful when Allah's Name is not mentioned over them -- even if slaughtered by a Muslim. The Ayah about hunting game,
فَكُلُواْ مِمَّآ أَمْسَكْنَ عَلَيْكُمْ وَاذْكُرُواْ اسْمَ
…The Prohibition of what was Slaughtered in other than Allah's Name
This Ayah is used to prove that slaughtered animals are not lawful when Allah's Name
…