Jesus had been speaking to St. Faustina for quite some time and teaching her about His unending love for each one of us. One time while in prayer Jesus appeared to her and taught her this very special chaplet.
"When I entered my solitude, I heard these words —
“At the hour of their death, I defend as my own glory, every soul that will say will say this chaplet; or when others say it for a dying person, the indulgence is the same. When this chaplet is said by the bedside of the dying person, God’s anger is placated, unfathomable mercy envelopes the soul, and the very depths of My tender Mercy are moved for the sake of the sorrowful Passion of My Son.” (Diary, 811)
“While I was saying the chaplet, I heard a voice that said,
"Oh, what great graces I will grant to souls who say this chaplet: the very depths of My tender Mercy are stirred for the sake of those who say the chaplet. Write down these words, My daughter. Speak to the world about My Mercy; let all mankind recognize My unfathomable Mercy. It is a sign for the end times; after it will come the day of justice. While there is still time, let them have recourse to the fount of My Mercy; let them profit from the Blood and Water which gushed forth for them.” (Diary, 848)
Our Lord taught St. Faustina a prayer for Mercy that she was to pray “unceasingly.” He told her that if she prayed in this way, her prayers would have Great power for the conversion of sinners, for peace for the dying and even for controlling nature. This prayer became known as the Chaplet of the Divine Mercy.
We, too can pray this chaplet, using ordinary rosary beads of five decades. We begin with the Our Father, the Hail Mary, and the Apostles’s Creed.
Then on the large beads we pray:
Eternal Father, I offer you the Body and Blood, Soul and Divinity of Your Dearly Beloved Son, Our Lord, Jesus Christ in atonement for our sins and those of the whole world.
On the small beads we pray:
For the sake of His Sorrowful Passion, Have Mercy on Us and On the Whole World. (Diary, 475)
And at the end we pray three times:
Holy God, Holy Mighty One, Holy Immortal One, have mercy on us and on the whole world. (Diary, 476)