Plato said this quote

All began to change in the reverse direction and grow more tender. The white hair of the elderly began to grow black; the cheeks of the bearded to grow smooth, and one and all to return to the season of bloom that they had left behind them. Young men’s bodies grew smoother and smaller day by day and night by night till they reverted alike in mind and body to the likes of a newborn infant, and then dwindled right away and were clean lost to sight.