In English, the phrase "I rest my case" can be used in a conversation by one person whose point has just been proven by the other person. In a legal sense, it would mean that a lawyer has concluded their argument, but in an idiomatic sense it can be used more generally. For example:
A: You eat way too much during the day. You need to go on a diet.
B: That's not true. I only have breakfast, brunch, lunch, dinner, and 4-5 snacks during the day.
A: I rest my case.
Is there a similar idiom or phrase used in these situations in Spanish?