Shaykh-ul-Islam Hazrat Maulana Hussain Ahmad Madani (may Allah have mercy on him) has narrated an incident in his sermons that a boy fell in love with a girl but this girl got married somewhere else. I was trying to marry you but I was not lucky. Now, if you meet me once, I will fulfill whatever order you have for her. The girl was kind. She said, “Pray in congregation for forty days behind Hazrat Farooq Azam.
https://www.youtube.com/watch?v=yBxQGVav36s
… The boy used to walk towards the girl’s house but after 40 days he stopped going … The girl sent a message that if my order is fulfilled then I will be present. The boy said: I used to love you in my heart but now the love of Allah has settled down. Now you and I have parted ways. The girl told this to her husband. He said that Allah has said the truth: “Surely prayer prevents people from indecency and evil words.” (Madani Sermons)