Organs which cannot be eaten
Consuming the following is forbidden:
1. Flowing blood.
2. Male and female genitalia, (the penis and the
uterus).
3. Testicles.
4. Gall bladder.
5. Urinary bladder.
6. Glands.
7. The marrow of the spine.
As mentioned in Radd Ul Muhtaar:
(Radd Ul Muhtaar, Vol. 5, Pg. No. 219)
It is also mentioned in Fatawa A’alamgiri:
(Fatawa A’alamgiri, Vol. 6, Pg. No. 445)
Drawing any benefit from the sacrificial animal before slaughtering
it, like milking it, using it as a freight animal, riding it, giving it out on
hire, etc. are all Makruh (undesirable)