O Radix Jesse, qui stas in signum populorum,
super quem continebunt reges os suum,
quem Gentes deprecabuntur:
veni ad liberandum nos, jam noli tardare.

O Root of Jesse, standing as a sign among the peoples;
before you kings will shut their mouths,
to you the nations will make their prayer:
Come and deliver us, and delay no longer.

There shall come forth a shoot from the stump of Jesse, and a branch shall grow out of his roots. Isaiah 11:1

In that day the root of Jesse shall stand as an ensign to the peoples; him shall the nations seek, and his dwellings shall be glorious. Isaiah 11:10

For more information on the O Antiphons, click here to read the December 17th post.