Haram Speech & character
Yes. The Quran warns against breaking oaths after making them firm (16:91), and warns those who sell Allah's covenant and their oaths for a small price (3:77). Swearing by Allah on a lie, in order to take money or a right, is a major sin.
وَأَوْفُوا۟ بِعَهْدِ ٱللَّهِ إِذَا عَٰهَدتُّمْ وَلَا تَنقُضُوا۟ ٱلْأَيْمَٰنَ بَعْدَ تَوْكِيدِهَا وَقَدْ جَعَلْتُمُ ٱللَّهَ عَلَيْكُمْ كَفِيلًا ۚ إِنَّ ٱللَّهَ يَعْلَمُ مَا تَفْعَلُونَ ﴿٩١﴾
Na timizeni ahadi ya Mwenyezi Mungu mnapo ahidi, wala msivunje viapo baada ya kuvithibitisha, ilihali mmekwisha mfanya Mwenyezi Mungu ndiye mdhamini wenu. Hakika Mwenyezi Mungu anayajua myatendayo.
إِنَّ ٱلَّذِينَ يَشْتَرُونَ بِعَهْدِ ٱللَّهِ وَأَيْمَٰنِهِمْ ثَمَنًۭا قَلِيلًا أُو۟لَٰٓئِكَ لَا خَلَٰقَ لَهُمْ فِى ٱلْءَاخِرَةِ وَلَا يُكَلِّمُهُمُ ٱللَّهُ وَلَا يَنظُرُ إِلَيْهِمْ يَوْمَ ٱلْقِيَٰمَةِ وَلَا يُزَكِّيهِمْ وَلَهُمْ عَذَابٌ أَلِيمٌۭ ﴿٧٧﴾
Hakika wanao uza ahadi ya Mwenyezi Mungu na viapo vyao thamani ndogo, hao hawatakuwa na sehemu ya kheri yoyote katika Akhera, wala Mwenyezi Mungu hatasema nao wala hatawatazama Siku ya Kiyama, wala hatawatakasa, nao watapata adhabu chungu.
This is general information, not a fatwa. For your own situation, ask a qualified scholar.
Yes. The Quran warns against breaking oaths after making them firm (16:91), and warns those who sell Allah's covenant and their oaths for a small price (3:77). Swearing by Allah on a lie, in order to take money or a right, is a major sin.
