'Uncircumcised' in the Bible

And Moses spoke before Jehovah, saying, Lo, the children of Israel do not hearken to me: how then should Pharaoh hearken to me, to me of uncircumcised lips?

And Moses said before Jehovah, Behold, I am of uncircumcised lips, and how will Pharaoh hearken unto me?

And when a sojourner sojourneth with thee, and would hold the passover to Jehovah, let all his males be circumcised, and then let him come near and hold it; and he shall be as one that is born in the land; but no uncircumcised person shall eat thereof.