Ishq Per Zor Nahin is a 1970 Hindi romantic movie based on love triangle story produced by Suresh Saigal and directed by Ramesh Saigal. The film stars Dharmendra, Sadhana, Biswajeet, Kamini Kaushal, Leela Mishra , Abhi Bhattacharya , Jagdeep, Nadira and Helen. The films music is by S. D. Burman. This is the only film in which Biswajit and Sadhna worked together. Similarly, this is the only movie in which Dharmendra and Sadhana worked together. The songs Ye Dil Diwana Hai, Mehbooba, Teri Tasveer, Tum Mujhse Door Chale Jana Na, and O, Mere Bairagi Bhanwara were composed by S D Burman. The musical instrument santoor was introduced in this film for the first time.
Source: Wikipedia