'Sacrificial' in the Bible

“Son of man, this is what the Lord God says: Tell every kind of bird and all the wild animals: Assemble and come! Gather from all around to My sacrificial feast that I am slaughtering for you, a great feast on the mountains of Israel; you will eat flesh and drink blood.

You will eat fat until you are satisfied and drink blood until you are drunk, at My sacrificial feast that I have prepared for you.