Бог не выдаст, свинья не съест

Etymology
Likely derived from an apocryphal Nativity story: when newborn Jesus was in the manger, a horse helped cover him in hay to hide him from Herod's men, while a pig tried to uncover him.

lit. 'if God doesn't give us up, a pig won't eat us'.

Proverb

 * 1) never say die and hope for the best