This is the O Antiphon for today, 22nd December.
O Rex Gentium, et desideratus earum,
lapisque angularis, qui facis utraque unum:
veni, et salva hominem,
quem de limo formasti.
O King of the nations, and their desire,
the cornerstone making both one:
Come and save the human race,
which you fashioned from clay.