اَلْعَدَد 8:21

فَتَطَهَّرَ ٱللَّاوِيُّونَ وَغَسَّلُوا ثِيَابَهُمْ، وَرَدَّدَهُمْ هَارُونُ تَرْدِيدًا أَمَامَ ٱلرَّبِّ، وَكَفَّرَ عَنْهُمْ هَارُونُ لِتَطْهِيرِهِمْ.

And the Levites were purified, and they washed their clothes; and Aaron offered them as an offering before the LORD; and Aaron made an atonement for them to cleanse them.