On May 13th 1917, Our Lady appeared to the three children for the first time. During this apparition they were inspired to pray thus:
Most Holy Trinity, I adore Thee!
My God, my God,
I love Thee in the Most Blessed Sacrament.
To say when offering up a sacrifice:
O Jesus, it is for the love of You,
in reparation for the offences committed
against the Immaculate Heart of Mary,
and for the conversion of poor sinners.
O my Jesus
Also on the 13th of June 1917, the Blessed Mother taught them the most famous of all Fatima prayers. She requested this prayer be said at the end of each decade of the Rosary, that is, following the ‘Glory be’:
O my Jesus, forgive us our sins,
save us from the fires of hell,
lead all souls into Heaven,
especially those in most need of Thy mercy.
These prayers were taught to St Lucia in 1931 in a vision where she met Christ. He asked her to pray for the Conversion and Salvation of the World through the Heart of Mary, His Mother:
By your pure and Immaculate Conception, O Mary,
obtain the conversion of Russia, Spain, Portugal, Europe and the whole world!
Sweet Heart of Mary, be the salvation of Russia, Spain, Portugal, Europe and the whole world.