Redirect and Referer in iRules

You are trying to insert the header into the inbound request and then send the 301 which obviously won't work. Try this instead.

when HTTP_REQUEST { 
 HTTP::respond 301 Location "https://bar.com[HTTP::uri]" Referer "foo.bar.com"
}

Also note your "'s seem slightly wrong, have you pasted from MS Word or something? I've corrected them above.