A person took an oath that he will never bathe a certain person or child. However, on the death of that person or child, he gave ghusl to him. His oath will break.
The husband took an oath that he will never beat his wife. Thereafter, he pulled her hair, throttled her or bit her out of anger. His oath will break. But if he bit her out of love, his oath will not break.
A person took an oath that he will definitely beat a certain person. But that person had passed away prior to this person’s oath. If this person did not know that he had already passed away and had therefore taken this oath, his oath will not break. But if he took this oath knowing fully that the person had already passed away, his oath will break the moment he takes it.
A person took an oath of doing something. By doing that thing even once in his entire lifetime he will absolve himself from his oath. For example, a person takes an oath that he will definitely eat a pomegranate. By his eating it just once in his lifetime, he will absolve himself from his oath. And if he takes an oath of not doing something, he will have to abstain from doing it for the rest of his life. For example, he says that he will never eat a pomegranate. He will have to abstain from eating it forever. If he eats it at any time, his oath will break. However, if he had taken such an oath with regard to a particular pomegranate or any other particular fruit, his oath will only break if he eats those which he had specified. If he buys some other pomegranates or any other fruit and eats them, his oath will not break.