Teachings of Presidents of the Church introduction to Joseph F. Smith recounts Mary Fielding Smith praying for her oxen to be healed.
"The Ministry of Joseph F. Smith," Teachings of Presidents of the Church: Joseph F. Smith (Salt Lake City: The Church of Jesus Christ of Latter-day Saints) xiv, 1998
As Joseph F. Smith journeyed westward with his family, he observed his mother meet challenge after challenge with faith. When her company captain unkindly insisted that the widow would be a burden to the whole company, she let him know that she would do her part and make her way, and even arrive in the valley before he did. And ultimately, she did! As the family’s herd boy, Joseph F. was keenly aware of the importance of the family’s precious cattle, so he never forgot how once through fervent prayer his mother located a lost team. Later, he recalled, she prayed for oxen who had “laid down in the yoke as if poisoned” that they might arise and move forward, and “to the astonishment of all who saw,” they “got up and we drove along.”