It seems to be an allusion in Buddhist scriptures.

When Sakyamuni Buddha was alive, Papman was very uncomfortable when he saw that Sakyamuni Buddha visited many people. He also came to see the Buddha and asked him to enter Nirvana as soon as possible: "You can enter Nirvana by visiting so many people." The Buddha was very merciful and promised him. The devil said to the Buddha, "If you are finished, I will destroy your Buddhism." The Buddha smiled and said, "Buddhism is truth, and truth determines that it cannot be destroyed." The demon king said, "After the end of Buddhism, I sent my demon son and grandson to become monks, all dressed in robes, to be your Buddhist disciples and destroy Buddhism." The Buddha didn't say a word and shed tears. Hearing this, the Buddha burst into tears and was speechless. Why is the Buddha crying? The answer is: Buddha is merciful and kind to all beings, including the devil. Buddha is the demon king. "I don't go to hell, and everyone who goes to hell has great compassion, but how can the lich king understand?" The Buddha thought again, this demon king is too poor. He has gone to rolling in the deep. When can he come out? The devil stepped on the abyss and didn't know it yet. I reached out to help him, but he came to harm my Buddhism. How can I save this ignorant demon? Buddha is merciful. Seeing that the demon king is poor and ignorant, he wants to control him. Buddha wants to control the demon, but the demon doesn't control himself. Buddha has no good way to save him. When the Buddha saw that the demon king was not self-reliant and could not control the demon, the poor demon king was speechless. The Buddha can be dismembered by King Goliath and swear to be the first to judge him. What's the Buddha afraid of? Just pity those who have Buddhism but don't learn self-sufficiency and boudoir, struggling in the sea of suffering, having no future, and feeling very uncomfortable! This is the story of the Buddha. The robber tried to kill a Zen master, and the Zen master cried. The robber asked why, and the Zen master said. "It doesn't matter whether I am dead or alive, but I pity you for returning to hell after doing all kinds of evil. What a pity! I cried when I remembered it! " Hearing this, the robber got a fright, fell to his knees and became a monk with the Zen master! The devil is not as sensible as the robber. The devil is stubborn, and the Buddha can only cry for him! Just as you advise a bad boy to study hard, he will not only not appreciate you, but also hurt you. Can you just cry and let nature take its course? That's why!