For Marriage
It is not a suitable case. Abandon it, otherwise, you will suffer a lifetime of hardship.
For Business / Deal
There is no Khayr (goodness) in this transaction; abandon it.
أَمْ يَقُولُونَ افْتَرَاهُ ۖ قُلْ فَأْتُوا بِعَشْرِ سُوَرٍ مِّثْلِهِ مُفْتَرَيَاتٍ وَادْعُوا مَنِ اسْتَطَعْتُم مِّن دُونِ اللَّهِ إِن كُنتُمْ صَادِقِينَ
Am yaqooloona iftarahu qul fatoo biAAashri suwarin mithlihi muftarayatin waodAAoo mani istataAAtum min dooni Allahi in kuntum sadiqeena
Or they may say, "He forged it," Say, "Bring ye then ten suras forged, like unto it, and call (to your aid) whomsoever ye can, other than Allah!- If ye speak the truth!