2 Chronicles 29:5, 23-24

He said to them, “Listen to me, you Levites! Purify yourselves, and purify the Temple of the LORD, the God of your ancestors. Remove all the defiled things from the sanctuary.

The male goats for the sin offering were then brought before the king and the assembly of people, who laid their hands on them. The priests then killed the goats as a sin offering and sprinkled their blood on the altar to make atonement for the sins of all Israel. The king had specifically commanded that this burnt offering and sin offering should be made for all Israel.