Dripping Water Penetrates Stone in Chinese / Japanese...

滴水穿石 is a Chinese proverb that means, dripping water penetrates stone.

The figurative meaning can be translated as:
Constant perseverance yields success.
You can achieve your aim if you try hard without giving up.
Persistent effort overcomes any difficulty.

While 滴水穿石 is the most common character order, you will likely see 水滴石穿, might see 滴水石穿, and will rarely see 小水穿石 in the wild.