Shemot 32:28-30

Orthodox Jewish Bible

²⁸ And the Bnei Levi did according to the word of Moshe; and there fell of HaAm that day about three thousand men.

²⁹ For Moshe had said, Consecrate yourselves today to Hashem, even every man against his ben, and against his brother; that He may bestow upon you a brocha this day.

³⁰ And it came to pass on the next day, that Moshe said unto HaAm, Ye have sinned a chata’ah gedolah; and now I will go up unto Hashem; perhaps I can make kapporah for your chattat.