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."
Exodus 32:29
Surrounding context
32:28 So the sons of Levi did according to the word of Moses. And about three thousand men of the people fell that day.
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."