Instructor biography of Mary Fielding Smith states she healed the ox.
"The Contribution of Women in the Teaching of the Restored Gospel," The Instructor, May 1930, accessed December 12, 2023
Mary Fielding Smith was another beautiful character in history, the wife of the martyred patriarch, Hyrum Smith, and mother of President Joseph F. Smith, the sixth president of our Church, and the first president born under the covenant. Just read the life of this mother in Israel and see how she achieved the marvel of motherhood and how she fortified herself by living the Gospel to stand the test of widowhood, persecution, poverty, neglect and even death. Can we realize the gloom of those two homes when with a family of four and the other Mary Fielding Smith now falter and also turn aside in this awful crisis? No, she did not. She had that divine testimony in her soul. Alone she traveled the plains with her little ones without fear, trusting only in her God, exhibiting a faith that has never yet been excelled. Upon those plains she called upon God's healing power to restore her dying ox, so her progress might not be impeded. The ox was healed and she journeyed on with her little ones. While we have had the conception of praying for our herds and our fields and crops, this woman gave us the divine thought that God's power can be manifest upon the dumb brute as well as upon human beings, a new revelation in faith. In all our history has any woman contributed such an example of implicit faith?-a faith that has come down to us and lives in the hearts of our young people of Zion.