ᾧ

τοῦ δὲ πολέμου οἱ καιροὶ οὐ μενετοί → in war, opportunities won't wait | the chances of war will not wait (Thucydides 1.142.2)

French (Bailly abrégé)

1 dat. sg. masc. et neutre de ὅς, ἥ, ὅ;
2 poét. p. ἑῷ dat. sg. du pron. possess. ἑός.

ᾧ: dat. sing. m и n к ὅς.