"Wherever your Protection casts its shade, O All-Spotless One..."

The Holy Protection of the Theotokos (source)

  
Wherever your Protection casts its shade, O All-Spotless One, there the power of the devil is cast out, for every one of the faithful that calls upon you is saved. Therefore, we also hasten to your radiance that resembles lightning, and are made beautiful through the sprinkling of the Spirit, and are satiated with the grace that breathes forth fragrance, and spiritually rejoice, partaking of the shining rays of wonders. For you have become an inexhaustible spring of good things, and an ineffable gushing forth of healings. We entreat you fervently: cover us, O Greatly-Compassionate One, in the hour of Judgment, and deliver us, your humble servants, from eternal torment, for nothing is impossible through your entreaty.
-Doxastikon of the Praises for the Feast of the Holy Protection of the Theotokos, Plagal of the First Tone.
  
(source)
  

Most-holy Theotokos, save us!