'Rules' in the Bible

But their worship is to no purpose, while they give as their teaching the rules of men.

And he said to him, Why are you questioning me about what is good? One there is who is good: but if you have a desire to go into life, keep the rules of the law.

On these two rules all the law and the prophets are based.

Teaching them to keep all the rules which I have given you: and see, I am ever with you, even to the end of the world.