["The council of Zahringen said that it was in possession of poison the Jews had scattered [throughout European Wells]. When tried, it proved fatal to animals." ](https://books.google.com/books?id=8a03DwAAQBAJ&pg=PT76&lpg=PT76&dq=aboget+well+poisoning+jew&source=bl&ots=hXxHZbzPgT&sig=ACfU3U3I520gRAgeT1MLpVZW_tmnN8Kr6w&hl=en&sa=X&ved=2ahUKEwj7vbXX6NjkAhXKrZ4KHaoxB-wQ6AEwCXoECAYQAQ#v=onepage&q=of%20Zahringen%20said%20it%20was%20in%20possession%20of%20the%20poison&f=false) [1348: Jews admit to poisoning wells & food "in order to destroy and wipe out the entire Christian religion"](https://faculty.humanities.uci.edu/bjbecker/PlaguesandPeople/week2c.html)