What is the ruling on taking a blood sample and donating blood while fasting?

The Shaykh : It is permissible for a fasting person to have a blood sample taken, meaning, taking a sample of his blood for testing and examination is permissible and there is no harm in it. As for donating blood, what appears is that donating blood involves a large amount, so it is given the ruling of cupping. It is said to the fasting person: Do not donate your blood unless dire necessity calls for it. In that case, there is no harm in it. For example, if the doctors say that this man who suffered a hemorrhage will die if we do not transfuse him with blood now, and they find a fasting person who can donate his blood, and the doctors say that it is obligatory to donate to him now, then at that time there is no harm in the fasting person donating his blood. He breaks his fast after this and eats and drinks for the rest of the day, because he broke his fast for dire necessity, like saving someone from a fire or a drowning person. Yes.