Drinking tea after meals to promote digestion originated from which famous book?

The concept of promoting digestion by drinking tea after meals originated from China's classic Dream of Red Mansions.

In the novel, there is a passage describing that the grandmother Jia said to Jia Baoyu at a banquet: "Drinking tea after meals can help digestion and relieve boredom." This sentence became the tradition of drinking tea to promote digestion later. A Dream of Red Mansions is a classic in the history of China literature. It describes the life of Jia Baoyu and Jia Jia, and incorporates many descriptions of food culture. This custom was also widely circulated by later generations and became a part of China people's food culture.