ἕλκεσιν ἐξανθεῖν
From LSJ
τὸ λακωνίζειν πολὺ μᾶλλόν ἐστιν φιλοσοφεῖν ἢ φιλογυμναστεῖν → to behave like a Lacedaemonian is much more to love wisdom than to love gymnastics (Plato, Protagoras 342e6)
Greek > English (Woodhouse)
break out into eruptions of the skin, break out into eruptions, burst out into eruptions of the skin