You have the primary source right in front of you!!!!!!!! What do you need me to explain it worse for? Print out the damn paper, sit down with a highlighter and read. FFS.
He looked at the primary source, and doesn't see it saying what you claim it says. So he's asking you for where, from the primary source, you found the source for making your claim. Given that he already looked at the source you cited, that doesn't seem like an extraordinary request...