Breaking the engagement does not necessarily entail injustice
8-3-2011 | IslamWeb
Question:
A father forced his son to marry his cousin and he unwillingly agreed out of obedience to his father. Seven years after they were engaged, the son did not accept to oppress his cousin and told her the truth. She then supplicated Allaah The Almighty against him and his sisters. Keeping in mind that he did not want to oppress her by marrying her, will Allaah The Almighty answer her supplication?
Answer:
All perfect praise be to Allaah, the Lord of the worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.
When a suitor does not marry his fiancée, this does not necessarily feature injustice to her, particularly if he does so for fear that he may not fulfill her rights. Consequently, she is not permitted to supplicate Allaah The Almighty against him or his sisters for this reason. Supplicating Allaah The Almighty against any Muslim without justification is a form of transgression in supplication and this is prohibited.
Shaykh-ul-Islam, Ibn Taymiyyah 
said, “It is prohibited to transgress in supplication for Allaah The Almighty Says (what means): {But do not transgress. Indeed, Allaah does not like transgressors.} [Quran 2: 190] Transgression could be committed either in the manner of supplication or in the object that is sought by supplication.”
Even if one is oppressed, he is not permitted to supplicate by asking for oppression, severing kinship ties, or for anything that may cause greater pain than that which was experienced by the oppressed person. It is better for him not to supplicate Allaah The Almighty against the oppressor in principle; rather, he should be patient, forgiving and entrust his affairs to Allaah The Almighty. If he wants to supplicate against the oppressor, he is permitted to supplicate in a way that is equal to the injustice that he suffers; otherwise, he is deemed a transgressor in supplication.
Allaah Knows best.