Exodus 32:28-30

Authorized (King James) Version

²⁸ And the children of Levi did according to the word of Moses: and there fell of the people that day about three thousand men. ²⁹ For Moses had said, Consecrate yourselves to day to the Lord, even every man upon his son, and upon his brother; that he may bestow upon you a blessing this day.

³⁰ And it came to pass on the morrow, that Moses said unto the people, Ye have sinned a great sin: and now I will go up unto the Lord; peradventure I shall make an atonement for your sin.