en_tn_condensed/hag/02/14.md

So Haggai answered and said, "So it is ... is unclean

"So Haggai answered and told them Yahweh's words: 'So it is ... is unclean"

So it is with this people and this nation before me

"I look at this people and this nation the same way." Yahweh reminds the priests that a clean thing that touches an unclean thing becomes unclean. He then reminds them that he thinks of them as unclean because they have been worshiping idols, and so everything they touch and make becomes unclean.

this is Yahweh's declaration

"this is what I, Yahweh, have declared". Yahweh speaks of himself to express the certainty of what he is declaring. See Haggai 1:9.

the work of their hands

"everything they have done" or "everything they make with their hands"