[Machine] The Messenger of Allah ﷺ said, "Every condition that is not mentioned in the Book of Allah is invalid, even if it is a hundred conditions."
قَالَ رَسُولُ اللهِ ﷺ «كُلُّ شَرْطٍ لَيْسَ فِي كِتَابِ اللهِ فَهُوَ بَاطِلٌ وَإِنْ كَانَ مِائَةَ شَرْطٍ»