Ezra 7:24

Also we certify you, that touching any of the priests and Levites, singers, porters, Nethinims, or ministers of this house of God ,.... The king had a right and perfect knowledge of the distinct offices and services of those persons, see Ezra 7:7 ,

it shall not be lawful to impose toll, tribute, or custom, upon them ; that they might be the less encumbered with the affairs of life, and be more at leisure to attend divine service, and do it the more readily and freely; it was usual with the Heathens to except ecclesiastics from taxes, tributes, and imposts; so the priests in Egypt F23 Diodor. Sicul. l. 1. p. 66. , and the Druids here in Britain F24 Caesar. Comment. de Bello Gall. l. 6. c. 13. .