'Priests' in the Bible

Thus said Jehovah of Hosts: 'Ask, I pray thee, the priests of the law, saying:

Lo, one doth carry holy flesh in the skirt of his garment, and he hath come with his skirt against the bread, or against the pottage, or against the wine, or against the oil, or against any food -- is it holy?' And the priests answer and say, 'No.'

And Haggai saith, 'If the unclean of body doth come against any of these, is it unclean?' And the priests answer and say, 'It is unclean.'