1 Chronicles 15:12-16

Context
15:12 He told them: “You are the leaders of the Levites’ families. You and your relatives must consecrate yourselves and bring the ark of the Lord God of Israel up to the place I have prepared for it. 15:13 The first time you did not carry it; that is why the Lord God attacked us, because we did not ask him about the proper way to carry it.” ¹  15:14 The priests and Levites consecrated themselves so they could bring up the ark of the Lord God of Israel. 15:15 The descendants of Levi carried the ark of God on their shoulders with poles, just as Moses had ordered according to the divine command.

15:16 David told the leaders of the Levites to appoint some of their relatives as musicians; they were to play various instruments, including stringed instruments and cymbals, and to sing loudly and joyfully. ² 

1 Chronicles 15:25-29

Context

15:25 So David, the leaders of Israel, and the commanders of units of a thousand went to bring up the ark of the Lord’s covenant from the house of Obed-Edom with celebration. 15:26 When God helped the Levites who were carrying the ark of the Lord’s covenant, they sacrificed seven bulls and seven rams. 15:27 David was wrapped in a linen robe, as were all the Levites carrying the ark, the musicians, and Kenaniah the supervisor of transport and the musicians; ³  David also wore a linen ephod. ⁴  15:28 All Israel brought up the ark of the Lord’s covenant; they were shouting, blowing trumpets, sounding cymbals, and playing stringed instruments. 15:29 As the ark of the Lord’s covenant entered the City of David, Michal, Saul’s daughter, looked out the window. When she saw King David jumping and celebrating, she despised him. ⁵