For Marriage
One cannot judge people by their appearances; if you proceed, you will deeply regret it.
For Business / Deal
This deal does not have the benefit you imagine, and you will even suffer a loss. Abandon it.
وَإِذْ أَخَذْنَا مِيثَاقَكُمْ لَا تَسْفِكُونَ دِمَاءَكُمْ وَلَا تُخْرِجُونَ أَنفُسَكُم مِّن دِيَارِكُمْ ثُمَّ أَقْرَرْتُمْ وَأَنتُمْ تَشْهَدُونَ
Waith akhathna meethaqakum la tasfikoona dimaakum wala tukhrijoona anfusakum min diyarikum thumma aqrartum waantum tashhadoona
And remember We took your covenant (to this effect): Shed no blood amongst you, nor turn out your own people from your homes: and this ye solemnly ratified, and to this ye can bear witness.