https://habibiaislamicus.com/index.php/hirj/article/view/88

In Islamic law it is necessary for a binding agreement to take place; certain conditions are be satisfied and valid transaction can formed if elements laid down in met order consider lawful. The majority of jurists hold that those essential upon which contract bases itself threefold. formation; Ijab Qabūl (Sighah) subject matter lastly the parties essence validity offer acceptance mutual consent. Besides, they also agreed there must three constitution acceptance. First, both clear definite, terms clarity, secondly conformity with Muqtadā al-àqd, means coherence or between last third continuity connected. other words, as basic rule contracting make whatever stipulations deem fit regulating their contractual relationship. will intervene only few exceptional cases invalidate such stipulation. This means, rather than invalidity stipulation general law.