The Sparks from Purgatory (Little Flowers of Saint Francis)

As Brother John was saying Mass on the day after All Saints, for the souls of the dead, as the Church has ordered, he offered with such charity and such compassion the holy sacrifice, which the dead desire above all else we can give them, that he seemed to be overwhelmed and consumed by the ardour of the feelings which filled his heart; and when he lifted up the Body of Christ and devoutly offered it to God the Father, entreating him, for the love of his blessed Son Jesus Christ, who had died on the cross for the souls of men, to deliver from the pains of purgatory the souls of the dead which he had created and redeemed, he saw immediately an immense number of souls go out from purgatory, like innumerable sparks of fire coming out of a burning oven; and he saw them go up to heaven, through the merits of the Passion of Christ, who is daily offered for the living and the dead in that most holy sacrifice, which is worthy to be adored for ever and ever.