'Lips' in the Bible

And Moses, answering the Lord, said, See, the children of Israel will not give ear to me; how then will Pharaoh give ear to me, whose lips are unclean?

And Moses said to the Lord, My lips are unclean; how is it possible that Pharaoh will give me a hearing?

You are not to make use of the name of the Lord your God for an evil purpose; whoever takes the Lord's name on his lips for an evil purpose will be judged a sinner by the Lord

Take note of all these things which I have said to you, and let not the names of other gods come into your minds or from your lips.