With accent marks:
Слеза́ми го́рю не помо́жешь.
You can't help grief with tears.
This Russian proverb reminds us that belated lamentation and tears often can not change anything in the situation. Better to wipe away your tears and move on, trying not to repeat past mistakes and make the best of what's given to us.
Similar proverbs are found in many other languages.
Other Russian proverbs
Bitter truth is better than sweet lies.
Оne can not see the wood for the trees.
Without labor, you can not even catch a fish in the pond.
With a darling, even a hut is a paradise.
Some to the forest, some for firewood.
You can't hide an awl in a bag.
Laws are not written for fools.
Beast runs towards the hunter.