I take care of my sister’s kids and sometimes, when I see them doing something inappropriate, I say “By God if you do that I will hit you.” I swear an oath in order to scare them and make realize that I am serious But sometimes they end up doing what I told them not to do. And when they do it, eventhough I made an oath that I will hit them, I mostly do not. My question is do I have to offer expiation to all the times I swore an oath without really acting upon it? And I do not remember how many times I have done this. Jazakallah