'Let Us' in the Bible

Then Peter said unto Jesus, Lord, it is good for us to be here: if thou pleasest, let us make three tabernacles here, one for Thee, and one for Moses, and one for Elias.

But when the husbandmen saw the Son, they said among themselves, This is the heir, come, let us kill him, and seize on his inheritance:

Rise, let us go, see the traitor is at hand.

the rest said, Stay, let us see whether Elias will come and save Him.