The Book of Psalms
Psalm 133
[A Song of Ascents. Of David.] Behold! How good and how pleasant [is] the living of brothers, even in unity.
[It is] like the precious oil on the head that ran down on the beard, Aaron's beard, going down to the mouth of his garments;
like the dew of Hermon coming down on the mountains of Zion; for there Jehovah commanded the blessing: life till everlasting.