Now it came to pass on the next day that Moses said to the people, "You have committed a great sin. So now I will go up to the LORD; perhaps I can make atonement for your sin."
Exodus 32:30
Surrounding context
32:29 Then Moses said, "Consecrate yourselves today to the LORD, that He may bestow on you a blessing this day, for every man has opposed his son and his brother."
32:30 Now it came to pass on the next day that Moses said to the people, "You have committed a great sin. So now I will go up to the LORD; perhaps I can make atonement for your sin."
32:31 Then Moses returned to the LORD and said, "Oh, these people have committed a great sin, and have made for themselves a god of gold!