This third was taught during a vision that Sister Faustina had on September 13, 1935: "I saw an angel, the executor of God's wrath, to the point of reaching the earth. I began to implore God for the world with Heard words internally, while praying like this, I saw that the angel was abandoned, and that he could no longer carry out the punishment.

The next day an inner voice taught him this prayer on the rosary beads.

"By reciting this rosary, I am pleased to give all that is asked of me, when they recite to hardened sinners, I will fill their souls with peace, and their hour of death will be happy. The soul sees and recognizes the gravity of its sins, when all the abyss of misery into which you have collapsed awake, do not despair, but throw yourself confidently into the arms of my mercy, Like a child in the arms of His dear mother... These souls have on my merciful heart a right of precedence, and they say that no soul who has turned to My mercy has been disappointed or experienced vexation.

"When you pray this rosary with the dying, I will be between the Father and the dying soul, not as a just Judge, but as a merciful Savior."

The rosary also includes the contemplation of certain passages from the life of Jesus and his mother Mary, which according to the doctrine of the Catholic Church are of special relevance to the history of salvation and are called "mysteries".
Traditionally, the rosary was divided into three equal parts, with fifty balls each and which, because they corresponded to the third part, were called rosaries.