What a wonderful message is contained in this song! Let me answer the question above first, and then I’ll cover some other issues. So the Hebrew words “Hine ma tov uma naim shevet achim gam yachad” are from Psalm 133 in the Hebrew Bible. I have always loved this psalm, and since the entire thing is so short I’m quoting it in full:
Behold, how good and how pleasant it is for brethren to dwell together in unity!
It 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;
As 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. (KJV)