Sahih Muslim #234Sahih
أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللَّهُ وَحْدَهُ لَا شَرِيكَ لَهُ، وَأَشْهَدُ أَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُولُهُ. اللَّهُمَّ اجْعَلْنِي مِنَ التَّوَّابِينَ وَاجْعَلْنِي مِنَ الْمُتَطَهِّرِينَ
The Prophet (peace be upon him) said: 'There is no one among you who performs wudu and perfects it, then says: Ashhadu an la ilaha illallahu wahdahu la sharika lahu, wa ashhadu anna Muhammadan 'abduhu wa rasuluh — except that all eight gates of Paradise are opened for him and he may enter through whichever one he wishes.'