εἰ μὴ κατένιψε χιόνι τὴν Θρᾴκην ὅλην
From LSJ
ἄνδρες τεθνᾶσιν ἐκ χερῶν αὐτοκτόνων → the men are dead, murdered by their very own hands | dead are our chiefs by fratricidal hands | by kindred hands and mutual murder slain | their hands have killed each other
had it not snowed all over Thrace