Surat An-Nahl (115-116)

{إِنَّمَا حَرَّمَ عَلَيْكُمُ الْمَيْتَةَ وَالْدَّمَ وَلَحْمَ الْخَنزِيرِ وَمَا أُهِلَّ لِغَيْرِ اللّهِ بِهِ فَمَنِ اضْطُرَّ غَيْرَ بَاغٍ وَلاَ عَادٍ فَإِنَّ اللّهَ غَفُورٌ رَّحِيمٌ} (النحل: 115)

115- Indeed, Allah prohibited on you dead animals which are not slaughtered except fish and Lycos. Also, Allah prohibited blood and swine whether is slaughtered or died forcefully, and animals that are slaughtered for other than Allah such as idols.

There is no harm on those who are obliged to eat them without going too far in that or eat it on purpose, just to fulfill his needs.

When people eat the prohibited animals, Allah forgives them, for He is All-Merciful where He allowed them to do so.

{وَلاَ تَقُولُواْ لِمَا تَصِفُ أَلْسِنَتُكُمُ الْكَذِبَ هَذَا حَلاَلٌ وَهَذَا حَرَامٌ لِّتَفْتَرُواْ عَلَى اللّهِ الْكَذِبَ إِنَّ الَّذِينَ يَفْتَرُونَ عَلَى اللّهِ الْكَذِبَ لاَ يُفْلِحُونَ} (النحل: 116)

116- Do not lie and claim the prohibition of things which Allah made lawful or make lawful the things which Allah prohibited as you used to do during the Pre-Islamic Period. Allah says: "And according to their pretending, they say that such and such cattle and crops are forbidden, and none should eat of them except those whom we allow. And (they say) there are cattle forbidden to be used for burden or any other work, and cattle on which (at slaughtering) the Name of Allah is not pronounced; lying against Him (Allah). He will recompense them for what they used to fabricate." [Surat Al An`am: 138].

Ibn Kathir (may Allah bestow mercy on his soul) said: This includes everything innovated without being based on a religious proof, everything made lawful, or prohibiting anything Allah permitted just by mere speculation.

Lawful and prohibition must be based on Allah's Judgment or the judgment of the Prophet (peace be upon him). As for those who attribute lies to Allah shall not succeed in the world or in the Hereafter, and shall not be safe of Allah's Torment.