After these things, Moses and Aaron entered, and they said to Pharaoh: "Thus says the Lord God of Israel: Release my people, so that they may sacrifice to me in the desert."
Therefore, you should gird your waist, and rise up, and speak to them everything that I instruct you. You should not have dread before their face. For I will cause you to be unafraid of their countenance.
And the Lord said to me: "Do not choose to say, 'I am a boy.' For you shall go forth to everyone to whom I will send you. And you shall speak all that I will command you.
"Son of man, I have made you a watchman for the house of Israel. And so, you shall listen to the word from my mouth, and you shall announce it to them from me.
You shall not add to the word which I speak to you, neither shall you take away from it. Preserve the commandments of the Lord your God which I am teaching to you.