Dua on Completion of Wudu

اللَّهُمَّ اجْعَلْنِي مِنَ التَّوَّابِينَ وَاجْعَلْنِي مِنَ الْمُتَطَهِّرِينَO Allah, make me from amongst who are the repenters and among those who keep very clean.(Tirmidhi)Source:Central Mosque