I say, and with God's success: It is a condition for the slaughter that purifies the skin and meat of the slaughtered animal that it be done by its people, meaning that a Muslim or a person of the Book performs the slaughter without intentionally neglecting the invocation, according to the most apparent opinion, and that the slaughter is done in its proper place. Everything that purifies its skin through tanning also purifies its skin and meat through slaughter, even if its meat is not eaten. What does not purify its skin through tanning does not purify through slaughter. Refer to: Sharh Al-Waqaya, p. 101, and God knows best.