Τηθύς
πρὶν τοὺς ἰχθῦς ἑλεῖν σὺ τὴν ἅλμην κυκᾷς → you're mixing the sauce before catching the fish | don't count your chickens before they are hatched | don't count your chickens before they hatch | first catch your hare | first catch your rabbit | first catch your rabbit and then make your stew | first catch your hare, then cook it | first catch your hare, then cook him
English (LSJ)
ύος, ἡ, Tethys, wife of Oceanus, nurse of Hera, Il.14.201, 302; daughter of Uranus and Gaia, mother of the river-gods and Oceanides, Hes.Th.136,337, cf. A.Pr.137 (anap.), Th.311 (lyr.);
A Ὠκεανὸν . . καὶ Τηθὺν ἐποίησαν τῆς γενέσεως πατέρας Arist.Metaph. 983b30; taken as type of a very old woman, prob. in Call.Iamb.1.248 (Hermes 69.174); cf. προτήθυς. II in later writers, the Sea, Lyc.1069, AP7.214.6 (Arch.), Nonn.D.31.187, Orph.A.335, etc., cf. Porph. ap. Eus.PE3.11, Suid. [ῡ in disyll. cases, ῠ in trisyll.]
