'We Have Sinned' in the Bible

Aaron said to Moses, "Oh, my lord, please don't count this sin against us, in which we have done foolishly, and in which we have sinned.

They rose up early in the morning, and went up to the top of the mountain, saying, "Behold, we are here, and will go up to the place which Yahweh has promised: for we have sinned."

The people came to Moses, and said, "We have sinned, because we have spoken against Yahweh, and against you. Pray to Yahweh, that he take away the serpents from us." Moses prayed for the people.