In reading Fly While You Still Have Wings: And Other Lessons My Resilient Mother Taught Me, I came across this prayer to our Blessed Mother for protecting one's children. Sr. Joyce Rupp found it among her mother's things after she died:
Be a protecting Mother to my children. Guard their bodies and keep them in health and strength. Guard their minds and keep them pure and strong and happy in the love of God. Always Mother, protect them and keep them under your motherly care.