Ezekiel 35:13 Thus with your mouth ye have boasted against me, and have multiplied your words against me: I have heard them.
These people were the enemies of God. They felt that they could do what they wanted. They felt that God could say nothing to them, He could do nothing. They bragged about how powerful they were. They had lots to say till God spoke. Now God tells them that He hears them. He knows what they think. He knows who they are and what they are saying.
Today many people still speak against God. They think that He doesn’t exist and can’t do anything, They will soon find out who God is. He hears them. He will do something about it eventually. God is exactly that God. Creator, owner, in charge, king, almighty, all powerful, all knowing, all present God is who He is.