For Marriage
It is very bad. You will have a miserable life, and nothing but strife and conflict is foreseen.
For Business / Deal
It is bad; your wealth and reputation will be jeopardized, and no matter what you do, it will not yield results. Abandon it.
الَّذِينَ كَفَرُوا وَصَدُّوا عَن سَبِيلِ اللَّهِ أَضَلَّ أَعْمَالَهُمْ
Allatheena kafaroo wasaddoo AAan sabeeli Allahi adalla aAAmalahum
Those who reject Allah and hinder (men) from the Path of Allah,- their deeds will Allah render astray (from their mark).