Supplicating Against the Transgressor
16-5-2018 | IslamWeb
Question:
My brother-in-law and sister are currently living with me and my family (i.e. my parents and sister) temporarily and they are emotionally harming and hurting me a lot! They backbite about me, criticise me behind my back for pretty much anything that I do and how I do a lot of the things I do, indirectly accuse me behind my back of (maybe) being afflicted with evil eye just because I suffer from waswasah which leads me to doing things that a muwaswis does, indirectly accuse me of lying and make me look like a liar behind my back, speak about me behind my back as if I am a failure, weirdo and a lowlife, think of plans behind my back about calling someone to do ruqyah on me, indirectly try to indicate behind my back if there is something wrong with me. I feel like they pick on me, maybe because I am the youngest sibling - I am 18 years old - and they can get away with picking on me. I feel like they look down on me. I feel very much intimidated by them in my own house and I cannot even do wudoo’ in my own house without thinking of my brother-in-law, because I fear that he will criticise me behind my back and backbite about me for the way I even do wudoo’ and the way I pray. I feel intimidated in my own home and I feel oppressed and bullied. I am suffering from waswasah severely but the way these two are treating me behind my back is not helping at all, even though to my face they are nice to me! I think it was my sister who try to say that there is something wrong with me (i.e. that I am perhaps possessed or afflicted with evil eye) and I feel like my mother and other sister have taken this into consideration and this has gotten into their minds. Once I had a dispute and went outside the house, and my other sister thought that I was possessed and went to the graveyard. What advice do you have for me and how should I deal with them for the time that they are living with me and my family? Is it permissible for me to make du‘aa’ against them?Jazaakum-Allaah Khayran.
Answer:
All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad 
is His slave and Messenger.
First of all, we ask Allah to heal you and rid you from these whispers.
We advise you to turn to Allah by supplicating Him earnestly and to mention the Athkaar (mention of Allah) regularly especially the morning and evening Athkaar, and to perform Ruqyah on yourself.
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We notice that in your question you repeated many times the word ‘indirectly’ and ‘behind my back’, and we fear that this is mere illusions and that those whom you are talking about did not do what you said, and that this is nothing but whispers and Waswasah.
In principle, we should think good of your fellow Muslim and not suspect him, as Allah Says (what means): {O you who have believed, avoid much [negative] assumption. Indeed, some assumption is sin.} [Quran 49:12]
If someone conveyed what they said to you, then you have to ascertain the matter. Allah Says (what means): {O you who have believed, if there comes to you a disobedient one with information, investigate, lest you harm a people out of ignorance and become, over what you have done, regretful.} [Quran 49:6]
If we presume that someone has wronged you, then it is permissible to supplicate against the oppressor (the unjust), but it is better to pardon him. However, the permissibility of supplicating against the oppressor does not include the parents; as their children must be kind and dutiful to them even if they are unjust.
Al-Bukhaari wrote a Chapter in his book Al-Adab Al-Mufrad, entitled "Chapter: Dutifulness to Parents, even if they are unjust"; and in this chapter he mentioned the statement of Ibn ‘Abbaas 
who said: “Any Muslim who is kind to his parents hoping for the reward from Allah, Allah will open two gates of Paradise for him. If there is only one parent, then one gate will be opened. If he angers one of them, then Allah will not be pleased with him until that parent is pleased with him." He was asked, "Even if they wronged him?" He replied: "Even if they wronged him." [Al-Bukhaari]
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Allah knows best.