The Office hymns in the English Hymnal are not great for this feast; the traditional Vespers hymn is good, although I’m not sure whose translation this is:
All ye who seek for Jesus, raise
your eyes above, and upward gaze:
there may ye see the wondrous sign
of never-ending glory shine.
Behold him in celestial rays
who never knoweth end of days;
exalted, infinite, sublime;
older than heav’n or hell or time.
This is the Gentiles’ King and Lord;
the Prince by Judah’s race adored,
promised to Abraham of yore
and to his seed for evermore.
To him the prophets testify;
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