For Marriage
Do not do this under any circumstances, as you will have a very miserable and wretched life.
For Business / Deal
Your credit/reputation and wealth will be damaged as a result of this; it must be abandoned.
وَإِذَا حُشِرَ النَّاسُ كَانُوا لَهُمْ أَعْدَاءً وَكَانُوا بِعِبَادَتِهِمْ كَافِرِينَ
Waitha hushira alnnasu kanoo lahum aAAdaan wakanoo biAAibadatihim kafireena
And when mankind are gathered together (at the Resurrection), they will be hostile to them and reject their worship (altogether)!
