The Table Spread - 5:4
"They ask you what is lawful for them. Say, "Pure food is lawful for you. And eat that which Allah has taught you, and that which you have trained for you from what Allah has taught you, and that which the hunting animals such as the dog and the hawk have caught for you, and mention the name of Allah over it."Listen to Allah. Allah is quick in reckoning."
Haram substances:
The Cow/2:173
He has forbidden you only carrion, blood, pork and what is slaughtered in the name of none but Allah. Whoever is compelled (to eat them) does not commit a sin, provided he does not seek (a way of abuse) and does not exceed the limit. Allah is Forgiving, Merciful.
The Table Spread/5:3
Forbidden to you are carrion, blood, the flesh of swine and what is dedicated to none but Allah. Except that you slaughter them before they are dead, animals that have been strangled, shot, fallen, gored and eaten by beasts, and those slaughtered on sacred stones and distributed with fortune-telling arrows, yes, these are evil. The unbelievers have despaired of your religion today. Do not fear them; fear Me. Today I have perfected your religion for you, I have completed My blessing upon you, and I have chosen Islam as your religion. Whoever is in hardship because of hunger and eats without any temptation to sin, there is no sin on him. For Allah is Forgiving, Merciful.
The Cattle/6:145
"Say: "I do not find in what has been revealed to me anything forbidden for anyone who eats, except: carrion, spilled blood, the flesh of swine, which is unclean, and food devoted to none but Allah."And if anyone who is in hardship does not overstep the limit, then surely your Lord is Forgiving, Merciful."
The Bee/16:115
He has forbidden you only carrion, blood, pork and that which is dedicated to none but Allah. And whoever is compelled to eat them, Allah is Forgiving, Merciful, provided he does not desire them and does not exceed the limit.