Anonymous

I'm tearing my hair out looking for the exact wording / context and author of this quote, so I know it's a long shot.
The quote is something like "Don't take one step back" or "Don't take a single step back", something on those lines about not retreating even a single step. I'm almost certain it's in the context of the siege of Leningrad and may have been said by Stalin or Marshall Zhukov. I love the emotion of the quote so much, I'd love to have a concrete copy of it since I use it a lot. I even named one of my bands Leningrad after the heroism and tradgedy of the siege.
Please can you help me?
Many thanks,
Valentin