Завтрак съешь сам, обедом поделись с другом, а ужин отдай врагу

If you wish to stay healthy, do not eat much. See Где пиры да чаи, там и немочи (Г)

Var.: Ужин отдай врагу

Cf: By suppers more have been killed than Galen ever cured (Br.). Eat few suppers and you'll need few medicines (Am.). Lightest (Little) suppers make long lives (Am.). Suppers kill more than the greatest doctors can cure Am.). То lengthen your life, lessen your meals (Am.)