Not found jquery-1.6.3.min.js

Hello everybody,

In this morning I found this error on my header website:

Not Found

The requested URL /jquery-1.6.3.min.js was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.
Apache/2 Server at https://www.jqueryc.com Port 80

I tried to find where is the problem in every file of my wordpress and theme but I can’t find it.
The theme of my blog is gazpomag and it’s free.

Please help!