וַיִּֽתְקַדְּשׁ֔וּ הַכֹּהֲנִ֖ים וְהַלְוִיִּ֑ם לְהַעֲל֕וֹת אֶת־אֲר֥וֹן יְהוָ֖ה אֱלֹהֵ֥י יִשְׂרָאֵֽל׃
So the priests and the Levites sanctified themselves to bring up the ark of the LORD, the God of Israel.
Read commentary on I Chronicles 15:14, verse-by-verse classical interpretation.