dict XIII, Jan. 15, 1728: A plenary indulgence, once a month, to all those who shall daily devoutly say, and, at the same time, make with their heart these acts. This indulgence may be gained on any day, when, being truly penitent, after confession and communion, they shall pray for peace and union among Christian princes, for the extirpation of heresy, and for the triumph of holy Church.
He granted in like manner a plenary indulgence at the hour of death. Finally, to excite the faithful to a very frequent use of these acts, he extended the indulgence of seven years and seven quarantines (which, by the grant of his predecessor, could be gained only once a day) to every time that these acts are said with heartfelt devotion.
The same Sovereign Pontiff further declared that, to gain these indulgences, it is not necessary to make use of any set form of words, but that any one may use any form of words which he pleases, provided it expresses the particular motive of each of the three theological virtues. — " The New Raccolta."
