This is a falsely attributed quote. There's zero record of Zhukov (or anyone, particularly none of the various people this quote has been attributed to) saying this. It's a lazy stereotype of the CCCP's strategy during WWII and absolutely incorrect.

Yet it is still valid for their strategy during the invasion of Ukraine.

They don’t need sophisticated weaponry or artillery. Just a slow push until the opponent is exhausted.

Losses are irrelevant: they can always be hidden or denied because you control media.