For Marriage
You have not chosen a suitable case at all. Withdraw while it is still early; tomorrow, regret will be useless.
For Business / Deal
Do not do it under any circumstances; it leads to regret and financial and reputational loss.
هُوَ الَّذِي جَعَلَكُمْ خَلَائِفَ فِي الْأَرْضِ ۚ فَمَن كَفَرَ فَعَلَيْهِ كُفْرُهُ ۖ وَلَا يَزِيدُ الْكَافِرِينَ كُفْرُهُمْ عِندَ رَبِّهِمْ إِلَّا مَقْتًا ۖ وَلَا يَزِيدُ الْكَافِرِينَ كُفْرُهُمْ إِلَّا خَسَارًا
Huwa allathee jaAAalakum khalaifa fee alardi faman kafara faAAalayhi kufruhu wala yazeedu alkafireena kufruhum AAinda rabbihim illa maqtan wala yazeedu alkafireena kufruhum illa khasaran
He it is That has made you inheritors in the earth: if, then, any do reject (Allah), their rejection (works) against themselves: their rejection but adds to the odium for the Unbelievers in the sight of their Lord: their rejection but adds to (their own) undoing.