σέλᾳ

From LSJ

Ἐν ἀρχῇ ἦν ὁ Λόγος, καὶ ὁ Λόγος ἦν πρὸς τὸν Θεόν, καὶ Θεὸς ἦν ὁ Λόγος (Κατὰ Ἰωάννην 1:1) → In the beginning was the Word, and the Word was with God, and the Word was God.

Source

French (Bailly abrégé)

dat. sg. de σέλας.

Dutch (Woordenboekgrieks.nl)

σέλᾳ en σέλαϊ dat. sing. van σέλας.

Russian (Dvoretsky)

σέλᾳ: эп. (= σέλαϊ) стяж. dat. к σέλας.