The Water Seed / The Blessing Rat / The Hermit Who Did Nothing

A man helps a snake and is taken to the dragon god's palace, and the dragon god offers him anything he wants. He asks for water for his village. A white rat brings blessings to a man but his greedy neighbor steels it. A lazy man finds a tiny hermit in a pot. The lazier he is the more the hermit grows, until at last it fills the whole house. Source: crunchyroll