'We Have Sinned' in the Bible

And Aaron said to Moses, Oh, my lord, lay not, I pray thee, sin upon us, in which we have done foolishly, and in which we have sinned.

And they rose up early in the morning, and got up to the top of the mountain, saying, Lo, we are here, and will go up to the place which LORD has promised, for we have sinned.

And the people came to Moses, and said, We have sinned, because we have spoken against LORD, and against thee. Pray to LORD, that he take away the serpents from us. And Moses prayed for the people.