“On the Jews & their lies” is one source. Another source is the Works of Luther, that one can download online. Instead of blindly believing everything that you are taught, start researching to find out for yourself.
Look -- I requested what the source was for one particular un-sourced quote, which had nothing to do with Luther's own alleged anti-semitism -- which if one cared to examine records more fully themselves, can be seen to be more than matched from within Roman Catholicism (which is where he likely may have first gotten the ideas in the first place?)
It is up to yourself to better source the one quote concerning "milkmaids".
It could be helpful if one did not need to dig through massive amounts of text (once one searched online to find the full texts) but to instead have indicated what not only what the source actually was, but where within whichever source it would be found.
Peeling off a couple of names for things is better than nothing, but still leaves a lot to be desired.
You might have provided where you yourself had gotten the quote more directly from --- unless you were peeling it off from memory.
Uh, I have for years now been among those whom dig, dig, dig into archives and writings, bringing quotations from there, and (usually) providing direct links to what sources I myself utilize.
At times I even offer caveats as towards "testing" type of possible inherent limitations for the very sources and quotes which I rely upon while presenting whatever it is which I am discussing at any one time, here on the religion forum of FR.
It's not my job to chase down the sources from which you derive your own material.
You must be sort-of "new" around these parts?