With accent marks:
Гото́вь са́ни ле́том, а теле́гу зимо́й.
Get your sleigh ready in summer and your (horse-drawn) cart in winter.
This proverb reminds us to plan what we want to do and what we will need to do in advance so that any difficulties and unforeseen situations do not catch us by surprise.
There is almost the same proverb in English: "Repair your cart in December, in July your sledge remember".
Other Russian proverbs
Silent means consent.
A wolf is fed by his legs
Water does not flow under a lying stone.
The apple never falls far from the tree.
If I knew where I would fall, I would lay some straw there.
Man does not live thanks to bread alone.
Live for a century, learn for a century, but die being a fool anyway.
~ Seven babysitters make the kid to lose an eye.