μεθήῃ

From LSJ

πάτερ, ἄφες αὐτοῖς, οὐ γὰρ οἴδασιν τί ποιοῦσιν → father, forgive them, for they know not what they do

Source

French (Bailly abrégé)

3ᵉ sg. sbj. ao.2 épq. de μεθίημι.