at the time of slaughtering the animal...

at the time of slaughtering the animal, or before that but at a time connected to the act of slaughtering the animal, the person slaughtering the animal must mention the name of Allah the Exalted; it is not sufficient for someone else to mention it. It is sufficient to say ‘bismillāh’ or ‘allāhu akbar’; in fact, if he only says ‘allāh’, it is sufficient, although this goes against precaution (iḥtiyāṭ).

If he mentions the name of Allah the Exalted without an intention (qaṣd) to slaughter the animal, or if due to not knowing the ruling he does not mention the name of Allah the Exalted, the animal is not lawful to eat. However, there is no problem if he does not mention the name of Allah the Exalted due to forgetfulness; 5. the animal must make some movement after it has been slaughtered, even by moving its eyes or tail or striking its foot against the ground.

Fulfilment of this condition is necessary only when there is a doubt as to whether the animal is alive or not at the time of being slaughtered; otherwise, it is not necessary; 6. a normal amount of blood must drain out of the animal’s body. Therefore, if its blood congeals in its veins and does not drain out, or if the amount of blood that drains out is relatively little for an animal of its type, the animal is not lawful to eat.

However, if the amount of blood that drains out is relatively little due to the animal having bled before it was slaughtered, there is no problem; 7. a person must sever the animal’s throat with the intention of an Islamic slaughter.

Therefore, the animal is not lawful to eat if a knife falls from someone’s hand and happens to sever the throat of the animal, or if the person who is slaughtering the animal is asleep, intoxicated, or unconscious, or he is a non-mumayyiz child or an insane person, or if the knife draws against the throat of the animal for some other reason and it happens to sever its throat.