The Eucharist is transformed into blood and the image of the Lord in suffering when it is improperly transported between the pages of a book

This Eucharistic miracle draws our attention to how much the Blessed Sacrament of the Eucharist must be treated and received with all possible respect, without negligence . It is Jesus alive in flesh and blood before us and after we receive Him, He will stay with us in our body. There is nothing greater and more valuable than that. 

Proof of this was what happened in 1330 in the city of Siena, Italy. There was a very sick peasant who needed the priest to take the Host to him to receive Communion at home. Promptly the local priest answered the call, but in too much of a hurry... He went to the tabernacle, took a consecrated Eucharist and instead of placing it in the proper place, on a teak, he simply placed it in the middle of the pages of his breviary - a book that brings together the daily tasks of a priest, transporting communion inside to the sick person's house. 

Arriving at the place, he first answered the peasant's confession and then offered him communion. After the first sacrament was over, he then opened his breviary in the "search" for the lost host among its pages and when he found it, he was very surprised by what he saw: 

The Holy Eucharist was bloodied, staining the two pages of the breviary to which it was attached with the Blood of the Lord . Remorse came instantly to the priest for having treated Jesus Christ with such carelessness. 

He left the sick man's house, returned to Siena and went straight to Father Simão Fidati to confess and show him the miracle that had taken place. Father Simão was well known for his holiness, spiritual direction and for being a great preacher. Therefore, he considered him the exact person to whom he should entrust his testimony and keep the miraculous relic for future inspections needed by the Catholic Church. 

Later, the two pages of the breviary ended up taking different paths. Father Simão offered one of them as a gift to the Augustinian Fathers of Perugia . Unfortunately this page has been lost over time. But luckily the other page was taken by Simon to his hometown of Cássia, where in this place the holy relic came to be venerated over time by the population, local authorities and priests through processions and masses. This veneration was even included in the Municipal Statutes of the city of Cássia in 1387. 

The page with the host that remains incorrupt can be seen until today in a reliquary in the city of Cássia, in the Basilica of Santa Rita de Cássia, with enlarged photos and printed under a weak lens placed next to it: 

In these enlarged photos of the Eucharist staining the breviary page, one can clearly see the image made by the Blood of Christ of a man with an aspect of suffering, that is, representing the suffering of the Lord with the accomplished attitude. 

Every year on the feast of Corpus Christi, a procession takes place through the streets of Cássia leaving the church of Santo Agostinho with the monstrance containing the Eucharistic miracle. The miracle was very well documented, with the approval of the veneration of the relic by Pope Gregory XII, as well as its veracity by Pope Boniface IX.

_{References: TV Canção Nova, Christo Nihil Præponere, Padre Reginaldo Manzotti}