# The word that came to Jeremiah from Yahweh, when Nebuchadnezzar ... her cities, saying:

"This is the message that Yahweh gave to Jeremiah when Nebuchadnezzar ... her cities. He said," or "When Nebuchadnezzar ... her cities, Yahweh spoke this message to Jeremiah:". See Jeremiah 7:1.

# to Jeremiah

There is no need to translate using first person.

# waging war

"fighting"

# all of her cities

This refers to all the towns around Jerusalem.