The Hail Mary unites the Angel Gabriel's greeting at the Annunciation with Elizabeth's blessing at the Visitation, followed by the Church's petition for Mary's intercession. It is the heart of the Rosary.
English
Hail Mary, full of grace,
the Lord is with thee.
Blessed art thou amongst 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.
Latin (Ave Maria)
Ave Maria, gratia plena,
Dominus tecum.
Benedicta tu in mulieribus,
et benedictus fructus ventris tui, Iesus.
Sancta Maria, Mater Dei,
ora pro nobis peccatoribus,
nunc et in hora mortis nostrae.
Amen.
Origin: The first part comes from Scripture (Luke 1:28, 42). The second half developed through medieval piety and was standardized in the Roman Breviary by the 16th century. The Catechism explains its theology in §§2676-2677.