Wudu & Purity
Before entering the toilet
اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنَ الْخُبُثِ وَالْخَبَائِثِ
Allahumma innee a'oodhu bika minal-khubthi wal-khabaa'ith
O Allah, I seek refuge in You from the male and female evil spirits.
— Sahih Bukhari 142
On leaving the toilet
غُفْرَانَكَ
Ghufraanak
I seek Your forgiveness.
— Abu Dawud 30
Before starting wudu
بِسْمِ اللَّهِ
Bismillaah
In the name of Allah.
— Abu Dawud 101
After completing wudu — the eight gates of Paradise are opened
أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللَّهُ وَحْدَهُ لَا شَرِيكَ لَهُ وَأَشْهَدُ أَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُولُهُ
Ash-hadu an laa ilaaha illallaahu wahdahu laa shareeka lah, wa ash-hadu anna Muhammadan 'abduhu wa rasooluh
I bear witness that none has the right to be worshipped except Allah alone, without partner, and I bear witness that Muhammad is His slave and Messenger.
— Sahih Muslim 234
After completing wudu
اللَّهُمَّ اجْعَلْنِي مِنَ التَّوَّابِينَ وَاجْعَلْنِي مِنَ الْمُتَطَهِّرِينَ
Allahummaj-'alnee minat-tawwaabeena waj-'alnee minal-mutatah-hireen
O Allah, make me among those who constantly repent, and make me among those who purify themselves.
— Tirmidhi 55