来年のことを言うと鬼が笑う（らいねんのことをいうとおにがわらう）

Japanese vocabulary

Meaning: nobody knows the morrow; speak of next year and the ogres laugh

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “来年のことを言うと鬼が笑う” pronounced in real videos (YouGlish)