He said to them, "You are the heads of the fathers' houses of the Levites; sanctify yourselves, you and your brethren, that you may bring up the ark of the LORD God of Israel to the place I have prepared for it.
1 Chronicles 15:12
Surrounding context
15:11 And David called for Zadok and Abiathar the priests, and for the Levites: for Uriel, Asaiah, Joel, Shemaiah, Eliel, and Amminadab.
15:12 He said to them, "You are the heads of the fathers' houses of the Levites; sanctify yourselves, you and your brethren, that you may bring up the ark of the LORD God of Israel to the place I have prepared for it.
15:13 For because you did not do it the first time, the LORD our God broke out against us, because we did not consult Him about the proper order."