In the original Latin, the prayer says:
Ecce Crucem Domini! +
Fugite partes adversae! +
Vicit Leo de tribu Juda, +
Radix David! +
Alleluia! +
Translated:
Behold, the Cross of the Lord! +
Begone, all evil powers! +
The Lion of the tribe of Judah, +
The Root of David, has conquered! +
Alleluia, Alleluia! +