WHAT DEMONS SAY OF OUR LADY WILL SHOCK YOU

One day, when Saint Dominic was preaching at Carcassone, in France, an Albigensian heretic, who was possessed by Demons, was brought to him, because he had publicly spoken against the devotion of the most Holy Rosary.

The saint then ordered the Demons, in the name of God, to declare whether those things which he had said concerning the most holy Rosary were true; and howling with rage they said:

“Hear, oh Christians, all that this our enemy has said of Mary and of the most holy Rosary is entirely true.” They added, moreover, that they had no power against the servants of Mary; and that many who at death invoked Mary were saved, contrary to what they deserve. 

And finally they said:
“We are constrained to declare, that no one is lost who perseveres in devotion to Mary, and in the devotion of the most holy Rosary, for Mary obtains for sinners a true repentance before death.” 

Saint Dominic made the people immediately repeat the Rosary; and, oh miracle! at every “Hail Mary,” many Devils went out from that wretched man, in the shape of burning coals, so that when the Rosary was finished, he was entirely freed from them, and many heretics became converted.

(cf. Glories of Mary, by Saint Alphonsus de Ligouri)