γνώσει

From LSJ

Κύριε, βοήθησον τὸν δοῦλον σου Νῖλον κτλ. → Lord, help your slave Nilos ... (mosaic inscription from 4th-cent. church in the Negev)

Source

French (Bailly abrégé)

2ᵉ sg. f. att. de γιγνώσκω;
dat. sg. de γνῶσις.