Ephesians 5:19 

19 Speaking to yourselves in psalms and hymns and spiritual songs, singing and making melody in your heart to the Lord;

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Psalm 135:3 

3 Praise the Lord; for the Lord is good: sing praises unto his name; for it is pleasant.

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2 Chronicles 5:13 

13 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;