без труда не вытянешь и рыбку из пруда

посл. the best fish swim near the bottom
he who would catch fish must not mind getting wet
nothing to be got without pains
no pains, no gains
nothing venture, nothing have (gain, win)
no sweet without (some) sweat
no cross, no crown
a cat in gloves catches no mice
he that will eat the kernel must crack the nut
he that would eat the fruit must climb the tree