1 Chronicles 15:16 (KJV) [SUP]16 [/SUP]And David spake to the chief of the Levites to appoint their brethren to be the singers with instruments of musick, psalteries and harps and cymbals, sounding, by lifting up the voice with joy.
[HR][/HR]2 Chronicles 5:13 (KJV) [SUP]13 [/SUP]It came even to pass, as the trumpeters and singers were as one, to make one sound to be heard in praising and thanking the LORD; and when they lifted up their voice with the trumpets and cymbals and instruments of musick, and praised the LORD, saying, For he is good; for his mercy endureth for ever: that then the house was filled with a cloud, even the house of the LORD;
[HR][/HR]2 Chronicles 7:6 (KJV) [SUP]6 [/SUP]And the priests waited on their offices: the Levites also with instruments of musick of the LORD, which David the king had made to praise the LORD, because his mercy endureth for ever, when David praised by their ministry; and the priests sounded trumpets before them, and all Israel stood.
[HR][/HR]2 Chronicles 34:12 (KJV) [SUP]12 [/SUP]And the men did the work faithfully: and the overseers of them were Jahath and Obadiah, the Levites, of the sons of Merari; and Zechariah and Meshullam, of the sons of the Kohathites, to set it forward; and other of the Levites, all that could skill of instruments of musick.
[HR][/HR]2 Chronicles 5:13 (KJV) [SUP]13 [/SUP]It came even to pass, as the trumpeters and singers were as one, to make one sound to be heard in praising and thanking the LORD; and when they lifted up their voice with the trumpets and cymbals and instruments of musick, and praised the LORD, saying, For he is good; for his mercy endureth for ever: that then the house was filled with a cloud, even the house of the LORD;
[HR][/HR]2 Chronicles 7:6 (KJV) [SUP]6 [/SUP]And the priests waited on their offices: the Levites also with instruments of musick of the LORD, which David the king had made to praise the LORD, because his mercy endureth for ever, when David praised by their ministry; and the priests sounded trumpets before them, and all Israel stood.
[HR][/HR]2 Chronicles 34:12 (KJV) [SUP]12 [/SUP]And the men did the work faithfully: and the overseers of them were Jahath and Obadiah, the Levites, of the sons of Merari; and Zechariah and Meshullam, of the sons of the Kohathites, to set it forward; and other of the Levites, all that could skill of instruments of musick.
Deut 5, the OT law was only given to the Jews to keep, it was never given to Gentiles or NT Christians or anyone else to keep.
Furthermore, in Rom 7:1-7 Paul says it is sinful for a NT Christian who is married to Christ and His NT gospel to also keep the OT law.