'Let Us' in the Bible

Then after this, he said to his disciples, "Let us go to Judea again."

and I am glad for your sake that I was not there, so that you may believe. But let us go to him."

So Thomas (called Didymus) said to his fellow disciples, "Let us go too, so that we may die with him."

but I am doing just what the Father commanded me, so that the world may know that I love the Father. Get up, let us go from here."