ἔργοισι χρηστός, οὐ λόγοις ἔφυν μόνον → a friend in deeds, and not in words alone
Ar. and P. διάρροια, ἡ.
they suffered from diarrhoea: κάτω διεχώρει αὐτοῖς (Xenophon, Anabasis 4, 8, 20).