You find that your deskmate is always playing with his mobile phone, wasting time. Which poem would you suggest?

A lazy youth, a lousy age. The poem "Young people don't work hard, but the old people are sad" is a poem used to persuade people to work hard, which means that it is useless to be sad when they are young and strong. So I found that my deskmate was always wasting time playing mobile phones and had no intention of studying. I use the poem "Young people don't work hard, but old people are sad" to persuade them. Other poems that advise students to learn and youth must be early, so how can you grow into a teenager? Broad vision and appointment, accumulation and thinning; Faith can move mountains.