Perhaps nothing is both more critical and at the same time more difficult in leadership than effective communication. Sometimes what is said isn't heard or perceived as it was intended, which leads those being led to confusion and frustration.
So, work hard at making your communications as clear as possible. Not everyone listens well, especially in this day of texting without true verbal interaction. And the filters we have all accumulated in our minds can affect the communication both coming and going.
"I thought I heard you say...", when that wasn't at all what you said is a perpetual challenge that even good leaders will experience. What takes them from good to better finding ways to improve. And there is always room for improvement in all of us.