But you must not eat meat that has its lifeblood still in it

 Genesis 9:1-29

Then God blessed Noah and his sons, saying to them, “Be fruitful and increase in number and fill the earth. The fear and dread of you will fall on all the beasts of the earth, and on all the birds in the sky, on every creature that moves along the ground, and on all the fish in the sea; they are given into your hands. Everything that lives and moves about will be food for you. Just as I gave you the green plants, I now give you everything.

But you must not eat meat that has its lifeblood still in it. And for your lifeblood I will surely demand an accounting. I will demand an accounting from every animal. And from each human being, too, I will demand an accounting for the life of another human being.

And God said, “This is the sign of the covenant I am making between me and you and every living creature with you, a covenant for all generations to come: I have set my rainbow in the clouds, and it will be the sign of the covenant between me and the earth.

When Noah awoke from his wine and found out what his youngest son had done to him, he said, “Cursed be Canaan! The lowest of slaves will he be to his brothers.”

Why?

The Lord doesn't need to make a sign of the covenant between God and the earth, for the Lord can do everything in His mind and ways. But the Lord respects his creation, human beings.

Don't say any worse word to any one for we are sons of the Lord, our curse will be like the order of the Lord.

How?

Say encouraging words to people around us and don't curse others, for we have the right of the son of God.