'Let Us' in the Bible

Then answered Peter, and said unto Jesus, Lord, it is good for us to be here: if you will, let us make here three tabernacles; one for you, and one for Moses, and one for Elijah.

But when the tenants saw the son, they said among themselves, This is the heir; come, let us kill him, and let us seize his inheritance.

Rise, let us be going: behold, he is at hand that does betray me.

The rest said, Let be, let us see whether Elijah will come to save him.