1 Chronicles 15:26-27

26The Lord helped the Levites who were carrying his Covenant Box. So they offered seven bulls and seven male sheep as sacrifices to the Lord.

27David was wearing a robe that was made of good linen. All the Levites who were carrying the Covenant Box also wore linen clothes. So did the musicians and Kenaniah, their leader. David also wore a linen ephod over his robe.