"I will bless those who bless you",Great merits of this prophesy through Rosary.

"I will bless those who bless you", Catholics accessing the great merits of this prophesy through Rosary.
 
Numbers 24:9   Blessed are those who bless you Israel , and cursed are those who curse you.
 
Genesis 12:33 I will bless those who bless you and curse those who curse you. All the families of the earth will find blessing in you.
 
Praying the Rosary is seen as a powerful, visible, and deeply personal way to  honoring Mary (blessing her) and Jesus, which in turn brings God's blessings and merits to the faithful, fulfilling the ancient promise through the power of this specific Catholic prayer
Hail Mary, full of grace, the Lord is with you. Blessed are you  among women and blessed is the fruit of thy womb, Jesus. Holy Mary, Mother of God, pray for us sinners, now and at the hour of our death. Amen.
 
"Blessed are you  among women", we are blessing Mother Mary.  "blessed is the fruit of thy womb, Jesus." we are blessing Jesus. 
Catholics are  receiving great "Blessing" by repeatedly blessing Mother Mary and Jesus when doing rosary.
 
 Through the Holy Rosary, promising special graces, protection from hell, merits of the saints, a good death with sacraments, and high glory in heaven for those who pray it faithfully and reflect on its mysteries, fulfilling a promise of divine favor through Marian devotion and spiritual benefits
 
The Rosary's power comes from meditating on the lives of Jesus and Mary through its mysteries, turning repetition into contemplation, which builds union with Mary and Christ, fostering spiritual strength and bringing one closer to God.
 
Praying the Rosary offers great merits, drawing on the saints' example by
granting light, grace, protection from evil, fostering virtue, peace, and conversion, and leading to a holy death with a share in the saints' merits in paradise and deliverance from Purgatory, effectively building a deeper union with Christ and Mary, say Catholic teaching and saint.
 
Key Merits & Promises (from Our Lady)
Spiritual Protection: A powerful weapon against evil, destroying vice, decreasing sin, and defeating heresies; the soul won't perish.
Abundant Grace: Grants light and plentiful graces during life and at death, and obtains abundant mercy.
Holiness & Virtue: Makes virtue and good works flourish, drawing hearts from the world to eternal things.
Peace & Union: Brings peace, inner tranquility, and a deepened trust in God.
Holy Death & Afterlife: Prevents an unprovided death, ensures reception of sacraments, and allows participation in the saints' merits in paradise at the moment of death, with deliverance from Purgatory.