This can be stated in active form. Alternate translation: "The enemy armies will slaughter with swords her daughters who are in the fields" (See: [[rc://en/ta/man/jit/figs-activepassive]])
Possible meanings are 1) "Her daughters" were the young women of Tyre who were working in the fields or 2) "Her daughters" is a metonym for nearby towns and villages on the mainland that supported the main city of Tyre. Alternate translation: "Her daughter communities who are on the mainland" (See: [[rc://en/ta/man/jit/figs-metonymy]])
When Yahweh says that people will know that he is Yahweh, he is implying that they will know that he is the one true God who has supreme authority and power. See how you translated this in [Ezekiel 6:7](../06/07.md). Alternate translation: "understand that I am Yahweh, the one true God" or "realize that I, Yahweh, have supreme power and authority" (See: [[rc://en/ta/man/jit/figs-explicit]])