Difficult because not in modern Castilian.

These are the "Cantigas de Santa Maria," Alfonso X el sabio.
No, 42 is titled "A virgen mui groriosa" which is, I think, the one you cite.
Someone may have the cd "Cantigas de Santa Maria," Alfonso X el Sabio, sung by Ensemble Gilles Binchois and soloists, Ambroisie label, 2005- I believe it includes a booklet with translations. Track 4.

Also cd "Miracles: 13th c. Spanish Songs in Praise of the Virgin Mary," 1997, Chandos label, track 4. It may have a booklet with translations.