O my Jesus, forgive us our sins, save us from the fires of hell, and lead all souls to Heaven, especially those in most need of Your Mercy.
This prayer was revealed by our Lady to the children, Jacinta, Lucia, and Francisco (l to r in the pic), at Fatima on 13 July 1917. Responding to Lucia's question about she wanted them to do, Our Lady replied: "I want you to come here on the thirteenth of next month; to recite the rosary every day." She then told them to do something they had never heard of before: "After the Gloria Patri of each decade, you will say, ‘O my Jesus, forgive us our sins! Deliver us from the fires of hell! Have pity on the souls in purgatory, especially the most abandoned'."