The first two prayers were taught by the Angel of Peace to the children of Fatima (Lucia, Francisco, and Jacinta). The third prayer was inspired within the children by an inner impulse of the Holy Spirit, and the next two were taught to them by Our Lady of the Rosary. Jacinta was inspired to say the last prayer, “Sweet Heart of Mary…”
My God, I believe, I adore, I hope, and I love You; I ask pardon of You for those who do not believe, do not adore, do not hope, and do not love You.
Most Holy Trinity, Father, Son, and Holy Spirit I adore You profoundly. I offer You the Most Precious Body, Blood, Soul, and Divinity of Jesus Christ, present in all the tabernacles throughout the world, in reparation for the outrages, sacrileges, and indifference by which He is offended. And through the infinite merits of His most Sacred Heart, and of the Immaculate Heart of Mary, I beg the conversion of poor sinners.
O Most Holy Trinity, I adore You. My God, my God, I love You in the most Blessed Sacrament.
O Jesus, this is for love of You, for the conversion of sinners, for the Holy Father, and in reparation for the sins committed against the Immaculate Heart of Mary. (Jacinta added “the Holy Father”).
O my Jesus, forgive us our sins, save us from the fires of hell; lead all souls to Heaven, especially those in most need of Thy mercy.*
Sweet Heart of Mary be my salvation!
*“O my Jesus, forgive us, save us from the fire of hell. Lead all souls to Heaven, especially those who are most in need” is the literal translation from Lucia’s own words. Our Lady requested that this prayer be said at the end of each decade of the Rosary. Actual popular usage may vary but retain the essential meaning. Thus the popular form may be retained in order to avoid any confusion.
You can download prayer cards with these prayers here.