Here "his strong hand upon me" is an idiom that refers to Yahweh's power. AT: "Yahweh spoke to me in a very powerful way" (See: [[rc://en/ta/man/translate/figs-idiom]])
This is an indirect quote that ends in 8:17. AT: "warned me and said, 'Do not act like this people.'" (See: [[rc://en/ta/man/translate/figs-quotations]])
The people imagine there are conspiracies, and it makes them anxious. AT: "Do not worry like this people who think someone is always trying to harm them" (See: [[rc://en/ta/man/translate/figs-explicit]])
If you translate this as a direct quote, you can also translate it with Yahweh speaking in the first person: "But you will consider me, Yahweh of Hosts, as holy. And you will fear and be in awe of me" (See: [[rc://en/ta/man/translate/figs-quotations]] and [[rc://en/ta/man/translate/figs-pronouns]])