The Vision of the Most Holy Trinity and Our Lady of Fatima at Tuy, Spain, June 13, 1929
It was at this time, at the most solemn apparition of the whole series of Fatima apparitions, that Our Lady said to Sister Lucy:
“The moment has come in which God asks the Holy Father to make, and to order that in union with him and at the same time, all the bishops of the world make the consecration of Russia to My Immaculate Heart, promising to convert it because of this day of prayer and worldwide reparation.”
… Frère Michel de la Sainte Trinité, The Whole Truth About Fatima — Vol. II, p. 555.