Numbers 16:46

Then Moses said to Aaron and to his sons Eleazar and Ithamar, “Do not uncover your heads nor tear your clothes, so that you will not die and that He will not become wrathful against all the congregation. But your relatives, the whole house of Israel, shall weep over the burning which Yahweh has brought about.

“But the Levites shall camp around the tabernacle of the testimony so that there will be no wrath on the congregation of the sons of Israel. So the Levites shall keep charge of the tabernacle of the testimony.”

“And I have given the Levites as a gift to Aaron and to his sons from among the sons of Israel, to perform the service of the sons of Israel at the tent of meeting and to make atonement on behalf of the sons of Israel, so that there will be no plague among the sons of Israel by their coming near to the sanctuary.”

“So you shall keep the responsibility of the sanctuary and the responsibility of the altar, so that there will no longer be wrath on the sons of Israel.

and he went after the man of Israel into the tent and pierced both of them through, the man of Israel and the woman, through the body. Then the plague on the sons of Israel was checked.

and it shall be for him and his seed after him, a covenant of a perpetual priesthood, because he was jealous for his God and made atonement for the sons of Israel.’”

Then Araunah said, “Why has my lord the king come to his servant?” And David said, “To buy the threshing floor from you, in order to build an altar to Yahweh, that the plague may be checked from being upon the people.”

Before Him goes pestilence, And plague comes after Him.