My Capricorn Ox
The third ti e is the charm, is used to say that two efforts at something have already failed but perhaps the third will be successful.
The very first time this allusion to the number three appeared in print was in Elizabeth Barrett Browning's Letters addressed to R. H. Horne, 1839. In one letter she says: "The luck of the third adventure" is proverbial. The implication that it's proverbial suggests that this is something people have said for a long time https://www.youtube.com/watch?v=G2iZo8wErkQ