yogipd I believe the following is what you're looking for. Your first statement about abc.com changing to xyz.com seems a bit off. Did you mean to say that anything going to abc.com you want to redirect to xyz.com or is it only a specific path? Assuming the answer to my questions isn't yes, then the iRule below should work.
when HTTP_REQUEST priority 500 {
if {[HTTP::host] == "abc.com"}{
if {[string tolower [HTTP::uri]] == "/<PATH>"} {
HTTP::redirect "https://xyz.com[HTTP::uri]"
} elseif {[string tolower [HTTP::uri]] == "/ibsc/rrr/logon/login.jsp"}{
HTTP::redirect "https://xyz.com[HTTP::uri]"
}
}
}