Δαυιδ ψαλμός εἶπεν ὁ κύριος τῷ κυρίῳ μου κάθου ἐκ δεξιῶν μου ἕως ἂν θῶ τοὺς ἐχθρούς σου ὑποπόδιον τῶν ποδῶν σου
Of David. A psalm. The Lord said to my Lord: Sit at my right hand until I put your enemies as a footstool for your feet.
Rahlfs Septuagint
Greek text followed verse by verse by a direct English translation.