Some of them also were appointed to oversee the vessels, and all the instruments of the sanctuary, and the fine flour, and the wine, and the oil, and the frankincense, and the spices.  And some of the sons of the priests made the ointment of the spices.  And Mattithiah, one of the Levites, who was the firstborn of Shallum the Korahite, had the set office over the things that were made in the pans.  And other of their brethren, of the sons of the Kohathites, were over the shewbread, to prepare it every sabbath.  And these are the singers, chief of the fathers of the Levites, who remaining in the chambers were free: for they were employed in that work day and night.  These chief fathers of the Levites were chief throughout their generations; these dwelt at Jerusalem.
1 Chronicles 9:29-34

Pray for the peace of Jerusalem: they shall prosper that love thee.  Peace be within thy walls, and prosperity within thy palaces.  For my brethren and companions’ sakes, I will now say, “Peace be within thee.”
Psalm 122:6-8

A righteous man falling down before the wicked is as a troubled fountain, and a corrupt spring.
Proverbs 25:26