O God, who in your providential design willed that your Church be built upon blessed Peter, whom you set over the other apostles, look with favor, we pray, on Francis our Pope, and grant that he, whom you have made Peter’s successor, may be for your people a visible source and foundation of unity in faith and of communion. Through our Lord Jesus Christ, your Son, who lives and reigns with you in the unity of the Holy Spirit, one God, forever and ever. Amen.
Collect, Masses and Prayers for Various Needs and Occasions: 2. For the Pope, from the New Roman Missal
I've seen this in many places today without citation. I finally found the reference here.
For the Protection of the Holy Father
We pray, Lord, through the intercession of St. Michael the Archangel that you would protect our Holy Father from all enemies, especially from those who seek to destroy him in order to destroy the Church.