Hesabu 8 : 21 Numbers chapter 8 verse 21

Walawi wakajitakasa na dhambi, nao wakafua nguo zao; kisha Haruni akawasongeza mbele za Bwana wawe sadaka ya kutikiswa; Haruni akafanya kwa ajili yao ili kuwatakasa.
soma Mlango wa 8

The Levites purified themselves from sin, and they washed their clothes; and Aaron offered them for a wave offering before Yahweh; and Aaron made atonement for them to cleanse them.