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Behold, how good and how pleasant [it is] for brethren to dwell together in unity! Psalms 133:1

And walk in love, as Christ also hath loved us, and hath given himself for us an offering and a sacrifice to God for a sweetsmelling savour. (19) Speaking to yourselves in psalms and hymns and spiritual songs, singing and making melody in your heart to the Lord; (30) For we are members of his body, of his flesh, and of his bones. 
Ephesians 5:2,19,30