The Novena of Grace in honor of St. Francis Xavier is a Jesuit devotion that dates to the seventeenth century. Parishes, schools, and other institutions around the world sponsored by the Society of Jesus join together in prayer for the nine days leading up to the anniversary of the canonization of St. Ignatius and St. Francis Xavier on March 12, 1622. You can learn more about the novena here. A helpful resource from the Jesuit Institute can be found here.
Traditional Novena Prayer
O most kind and loving saint, in union with you I adore the most divine majesty. The memory of the favors with which God blessed you during life, and of your glory after death, fills me with joy. And I unite with you in offering to him my humble tribute of thanksgiving and praise. I implore of you to secure for me, through your powerful intercession, the all-important blessing of living and dying in a state of grace. I also ask you to obtain the favor I ask in this novena . . .
(here pause to ask the favor you seek)
But if what I ask is not for the greater glory of God, or the good of my soul, obtain for me what is most conducive to both. Amen. O God, who was pleased to gather to your Church the peoples of the East by the preaching and miracles of St Francis Xavier, mercifully grant that we, who honor his glorious merits, may also imitate the example of his virtues, through Jesus Christ our Lord. Amen.
Our Father . . . Hail Mary . . . Glory be to the Father . . .