The source is Xia Qing's classic song "Wild Sour Reveals Words" in the 27th time: "This is a thread, and a rope is thrown secretly. As the Taoist says, the boat of the three gods can't be close, and the nearest one needs to be led back by the wind."

Examples and those subtle twists and turns come once in a thousand years. (Zhu Ziqing's Classic Talks on Warring States Policy VIII)