n°19 / Psalms 133 :

1Behold, how good and how pleasant it is for brethren to dwell together in unity !
2It is like the precious ointment upon the head, that ran down upon the beard, even Aaron’s beard : that went down to the skirts of his garments ;
3As the dew of Hermon, and as the dew that descended upon the mountains of Zion : for there the LORD commanded the blessing, even life for evermore.