Δὸς δόξαν τῷ θεῷ
“Give glory to God!”
This is an idiom that the Jews used in putting someone under an oath. Note Joshua 7:19 (from the Septuagint, the greek translation of the Old Testament).
19 καὶ εἶπεν Ἰησοῦς τῷ Αχαρ Δὸς δόξαν σήμερον τῷ κυρίῳ θεῷ Ισραηλ καὶ δὸς τὴν ἐξομολόγησιν καὶ ἀνάγγειλόν μοι τί ἐποίησας, καὶ μὴ κρύψῃς ἀπ᾿ ἐμοῦ.
And Joshua said to Achan, “Give glory today to the Lord God of Israel, and give him thanksgiving, and report to me what you did, and don’t hide anything from me.
For fun, καὶ μὴ κρύψῃς ἀπ᾿ ἐμοῦ is also an idiom. It really says, “and don’t hide from me.” Anything is supplied to clarify what Joshua is saying.