Ezekiel 44:7

44:7 When you bring foreigners, those uncircumcised in heart and in flesh, into my sanctuary, you desecrate it – even my house – when you offer my food, the fat and the blood. You have broken my covenant by all your abominable practices.

Leviticus 3:16-17

3:16 Then the priest must offer them up in smoke on the altar as a food gift for a soothing aroma – all the fat belongs to the Lord. 3:17 This is a perpetual statute throughout your generations in all the places where you live: You must never eat any fat or any blood.’”