ηὑράμην

From LSJ

εἰ ἀποκρυπτόντων τῶν Μήδων τὸν ἥλιον ὑπὸ σκιῇ ἔσοιτο πρὸς αὐτοὺς ἡ μάχη καὶ οὐκ ἐν ἡλίῳ → if the Medes hid the sun, the battle would be to them in the shade and not in the sun

Source

French (Bailly abrégé)

v. εὑρίσκω.

Russian (Dvoretsky)

ηὑράμην: и εὑράμην aor. 1 к εὑρίσκω.