Say: 'I find nothing in what has been revealed to me that forbids any one to eat of any food except the dead, running blood, and the flesh of swine for these are unclean and that which has been hallowed in its slaughter to other than Allah. But whoever is constrained to eat of any of these, not intending to sin or transgress, then your Lord is Forgiving, the Most Merciful. 145 And to those who were Jews We made unlawful every animal having claws, and of oxen and sheep We made unlawful to them the fat of both, except such as was on their backs or the entrails or what was mixed with bones: this was a punishment We gave them on account of their rebellion, and We are surely Truthful. 146 'Then if they give you the lie, say: 'Your Lord is of unbounded mercy; but His punishment shall not be averted from the guilty folk.' 147 Those who associate others with Allah in His divinity will now surely say: 'Had Allah willed, neither we nor our forefathers would have associated others with Allah in His divinity, nor would we have declared anything (which Allah did not forbid) as forbidden.' Even so those who had lived before them gave the lie (to the Truth) until they tasted Our chastisement. Tell them: 'Have you any sure knowledge that you can produce before us? In fact you are only following idle fancies, merely conjecturing.' 148 Say, "Final authority belongs only to God. Had He wanted, He would have given you all guidance". 149 Say: 'Bring those witnesses of yours who can testify that Allah has forbidden this' If they testify to it, do not testify with them, nor follow the wishes of those who belie Our verses, and disbelieve in the Everlasting Life and ascribe equals to their Lord. 150