For Marriage
Finalize your talks and conditions at the very beginning, then proceed so that you do not regret it later.
For Business / Deal
Be careful and make the contract/deal firm and secure, then proceed.
لِّلَّهِ مَا فِي السَّمَاوَاتِ وَمَا فِي الْأَرْضِ ۗ وَإِن تُبْدُوا مَا فِي أَنفُسِكُمْ أَوْ تُخْفُوهُ يُحَاسِبْكُم بِهِ اللَّهُ ۖ فَيَغْفِرُ لِمَن يَشَاءُ وَيُعَذِّبُ مَن يَشَاءُ ۗ وَاللَّهُ عَلَىٰ كُلِّ شَيْءٍ قَدِيرٌ
Wain kuntum AAala safarin walam tajidoo katiban farihanun maqboodatun fain amina baAAdukum baAAdan falyuaddi allathee itumina amanatahu walyattaqi Allaha rabbahu wala taktumoo alshshahadata waman yaktumha fainnahu athimun qalbuhu waAllahu bima taAAmaloona AAaleemun
If ye are on a journey, and cannot find a scribe, a pledge with possession (may serve the purpose). And if one of you deposits a thing on trust with another, Let the trustee (Faithfully) discharge His trust, and let him fear his Lord. Conceal not evidence; for whoever conceals it,- His heart is tainted with sin. And Allah Knoweth all that ye do.