One way to avoid this statement is to give a direction, and then ask the other person (in words that feel comfortable to you) to repeat back what you have said - then you know they have understood you correctly.

For example, you might say:

"Can you go over what I have just said, to make sure that I have explained it properly?"
or
"I want to make sure that we both understand each other - can you summarise what we have been talking about, from your point of view?"

Something else to think about:

When someone says to you "I know my job", are they actually saying something else? Only you can answer that question.
Think about the tone of voice they used, the body language they displayed, your general relationship with the person.
Are they saying that they feel micromanaged?
I remember when I was managing people in my early career, it was very tempting to want people to do things exactly as I would.
But then I learned that as long as the outcome is achieved, it's OK if people approach it in different ways.
In fact, if you let them use their initiative it helps them to stay motivated. This doesn't mean that you walk away, it just means that you act more as a coach, giving people the support and guidance they need to find out things for themselves.

Hope that helps..

Ann