The Meaning of His Saying: "And Blood and the Flesh of the Pig"

The Shaykh : The second is blood. This is a general term that includes all blood, but with the condition that the blood not be from an animal slaughtered according to the Shari'ah. If it is from an animal slaughtered according to the Shari'ah, it is lawful. That is to say, if you slaughter a sheep in a lawful manner and it dies, and you begin to flay it and blood comes out of it, even if it is a lot, that is lawful because it came from an animal slaughtered according to the Shari'ah.
As for what comes out of a living animal, it is forbidden. In the pre-Islamic age of ignorance, when people traveled and their journey was cut off and their food ran out, a person would bleed a vein of his camel and suck it, drinking the blood. This is permissible in a case of dire necessity, but without dire necessity, it is not permissible.
And the flesh of the pig, which is a known foul animal that is forbidden. Allah the Exalted gave the reason for the prohibition of carrion, blood, and the flesh of the pig by saying: meaning: it is foul, foul by the Shari'ah and foul by nature, because these three things—carrion, blood, and the flesh of the pig—affect human health, affecting it severely. But sometimes the symptoms of this effect appear quickly, and sometimes they are delayed.