وَسَبَبُهُ اسْتِبَاحَةُ مَا لَا يَحِلُّ إِلَّا بِهِ، وَهُوَ حُكْمُهُ الدُّنْيَوِيُّ، وَحُكْمُهُ الْأُخْرَوِيُّ الثَّوَابُ فِي الْآخِرَةِ
Wudu permits acts that cannot be performed without it, such as prayer. Its worldly effect is that permission; its Hereafter effect is reward when done as worship.