Zaha signed a five-year deal with Manchester United but manager Ian Holloway was desperate to get him back on loan for the rest of the season. That decision could prove a masterstroke. Palace have already received £10m from his transfer but the estimated windfall for promotion to the Premier League is £120m.
Palace co-chairman Parish told the London Evening Standard: "We said to anyone who was interested that we would not sell him unless we got him back for the remainder of the season.
"I knew that he would come back and be himself because I know what Wilfried is like. By the time he leaves, he will have played nearly 150 games for Palace and I have never seen his effort waver for one minute.
"I have never seen a kid that is on loan from the Premier League work like that. You can see what the club means to him. It was not just his skills tonight, it was the work rate."