Again, this was right after the Golden Calf incident and Moses asked, "Who is on the Lord's side? Let him come to me." Is it not amazing that only one tribe jumped up? There is no mention of anyone else. Then all the sons of Levi came to Moses, and he sent them to do the Lord's bidding to uphold His law. And what did God do for the sons of Levi? He bestowed a blessing on them for they did not regard son or brother in upholding the truth of God. God's law was first priority, and God blessed them for it. Sin had entered the camp and it had to be eliminated. Unfortunately, this was not the only time that the Israelites would grieve the Holy Spirit.