'We Have Sinned' in the Bible

Then Aaron said to Moses, “Oh, my lord, I plead with you, do not account this sin to us, in which we have acted foolishly and in which we have sinned.

They got up early in the morning and went up to the ridge of the hill country, saying, “Look, here we are; we have indeed sinned, but we will go up to the place which the Lord has promised.”

So the people came to Moses, and said, “We have sinned, for we have spoken against the Lord and against you; pray to the Lord, so that He will remove the serpents from us.” So Moses prayed for the people.