2 Chronicles 29:30-34

Moreover Hezekiah the king and the princes commanded the Levites to sing praise unto the LORD with the words of David, and of Asaph the seer. And they sang praises with gladness, and they bowed their heads and worshipped.

Then Hezekiah answered and said, Now ye have consecrated yourselves unto the LORD, come near and bring sacrifices and thank offerings into the house of the LORD. And the congregation brought in sacrifices and thank offerings; and as many as were of a free heart burnt offerings.

And the number of the burnt offerings, which the congregation brought, was threescore and ten bullocks, an hundred rams, and two hundred lambs: all these were for a burnt offering to the LORD.

And the consecrated things were six hundred oxen and three thousand sheep.

But the priests were too few, so that they could not flay all the burnt offerings: wherefore their brethren the Levites did help them, till the work was ended, and until the other priests had sanctified themselves: for the Levites were more upright in heart to sanctify themselves than the priests.