the climax of the movie " MandiriKumari" including the song " vaarai nee vaarai" is inspired by which ancient tamil classic?

Kundala kesi - one of the five Kaapiams.

Kundalakesi is a princess who gets married to a crook. In the climax he takes her to the top of a mountain, claiming they are going to pray to his deity. On reaching the destination, he reveals she is going to kill her and take away her jewels.

She requests she will go around him to pay her final respect. While doing so, she pushes him down the hill.

Watch Mandiri kumari to see the similarity.