The sentence "I suddenly have an impulse to count my fingers" comes from which fairy tale?

It's definitely the romance of ghosts and gods. I've been watching it recently

Original text-

In addition, it is said that there is a Taiyi real person sitting on a biyou bed in Jinguangdong, Qianyuan Mountain, who is carrying the Yuan God and suddenly has a whim. Reader: However, if the immortal becomes immortal, he will never forget three things: worry, infatuation and love. His heart is as hard as stone and he will never waver. On a whim, my heart suddenly moved. If I hid it in my sleeve, I would know.