Answered by Shaykh Rami Nsour

Question: I understand that in the Maliki school only profuse bleeding invalidates the Wudu. My question is if donating blood or a blood test is considered profuse bleeding and does it invalidate the Wudu?

Answer: According to the Maliki school of law, bleeding does not invalidate wudu, regardless of the amount of blood loss. Therefore, a blood donation or a blood test would not invalidate the wudu.

[Mukhtasar Khalil]