"At one time the Rasul of Allah said to his cousin Ali, O Ali, you should not eat meat. If you eat meat for forty days, those qualities will come within you. Those actions will come within you. Their blood will come within you. Their qualities and their actions will come within you. Because of that, your human qualities will change, your compassionate qualities will change, the essence of your body will change. O Ali, you should not eat meat or flesh. You have to diminish that. Do not eat that."
Muhammad Raheem Bawa Muhaiyaddeen, Islamic Sufi saint