Source
Pomegranate
The red colored seeds of pomegranate contain many nutrients. Consuming pomegranate helps in purifying blood along with liver and kidney. Pomegranate seeds are rich in potassium, which is more effective for kidney cleansing.
You can also consume pomegranate seeds to prevent kidney stones. It helps in removing toxins from the liver and kidneys.
Red grape

​As reported by Medicine Net, red grapes contain kidney detoxifying nutrients. This bright red grape contains flavonoids which help in reducing inflammation of the kidneys. It also contains a variety of antioxidants, which help cleanse the kidneys and liver.
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Sum

Berries include strawberries, cranberries, blueberries, raspberries, etc. Among them, strawberries contain antioxidants and phytochemicals, and antioxidants in kidney and liver cells help reduce stress and inflammation. Actually strawberries are also known as liver and kidney detox juice. According to the Journal of Nutrition, drinking berry juice daily reduces the risk of urinary tract infections.
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Fruit juice

A combination of lemon, orange and watermelon juice is beneficial for both kidney and liver cleansing. Fruit juice also reduces the risk of kidney stones. Lemons, oranges, and watermelons help maintain fluid balance in the body.
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Watermelon

Watermelon is a red fruit rich in minerals and antioxidants that help reduce inflammation in the kidneys and liver. Watermelon also helps to balance phosphate, oxalate, citrate and calcium in the kidneys.
context
https://www.medicalnewstoday.com/articles/325391
https://sunwarrior.com/blogs/health-hub/12-of-the-best-foods-for-kidney-health-detox-and-cleansing