бог троицу любит(third time lucky (or US third time is the charm): used to express the hope that, after twice failing to accomplish something, one may succeed in the third attempt. NODE Alexander Demidov)
а в третий раз повезёт!(The belief or hope that the third attempt at something will be successful. Primarily heard in US. • I've failed this test twice already, so hopefully the third time's the charm. • A: "Try turning the generator on again." B: "OK, here we go. Third time's the charm!"MichaelBurov)