Where is weapon damage stated?

So I’ve read from multiple sources that weapon damage in the original D&D booklets is 1d6 regardless of weapon. However, reading through the books, I can’t find reference to weapon damage at all.

The books refer to Chainmail as the default combat system, but that has casualties determined directly by die rolls, it doesn’t deal with individual unit damage as far as I can tell. The alternate combat system also doesn’t seem to mention it.

What page is weapon damage stated on?