# over Babylon ... come for her

"over the Babylonians ... come for them ... the Babylonians have made ... their land"

# the heavens and the earth

Heaven and earth are viewed as if they were people.

# 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 Jeremiah 1:8.