The third revelation took place probably in 1674. In it the Redeemer asked Margaret Mary to propagate the practice of reparation and frequent communion, communion on the First Fridays of the month and a Holy Hour on Thursday evenings.
While in adoration before the Blessed Sacrament, Jesus appeared to her “resplendent with glory, with his five wounds shining like five suns.” He then made known to me the ineffable marvels of His pure love and showed me to what an excess He had loved men, from whom He received only ingratitude and contempt. “I feel this more than all that I suffered during My Passion. If only they would make Me some return for My Love, I should think but little of all I have done for them and would wish, were it possible, to suffer still more. But the sole return they make for all My eagerness to do them good is to reject Me and treat Me with coldness. Do you at least console Me by supplying for their ingratitude, as far as you are able.”
For this end, “you shall receive Me in Holy Communion as often as obedience [to your confessor and superiors] will permit you, despite the mortification and humiliation it may cause you, which you must receive as pledges of My Love. You shall, moreover, communicate on the First Friday of each month. Every night between the Thursday and the (first) Friday, I will make you share in My mortal sadness which I was pleased to feel in the Garden of Olives.”