After doing ablution well, one should say:
أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللَّهُ وَحْدَهُ لَا شَرِيْكَ لَهُ وَأَشْهَدُ أَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُوْلُهُ
Pronunciation
Ash-hadu 'an laa 'ilaaha 'illAllahu wahdahu laa shareeka lahu wa 'ash-hadu 'anna Muhammadan 'abduhu wa Rasooluhu
Meaning
I bear witness that none has the right to be worshipped but Allah alone, Who has no partner; and I bear witness that Muhammad is His slave and His Messenger (ﷺ). Uqba bin 'Amir (RA) reported: Allah's Messenger (ﷺ) say: If any Muslim performs ablution well, then stands and prays two rak'ahs setting about them with his heart as well as his face, Paradise would be guaranteed to him.
Source: Muslim: 234 , 576
Read the hadith
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، وَمُحَمَّدُ بْنُ بَشَّارٍ، قَالاَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي إِسْحَاقَ، قَالَ سَمِعْتُ الأَسْوَدَ، يُحَدِّثُ عَنْ عَبْدِ اللَّهِ، عَنِ النَّبِيِّ صلى الله عليه وسلم أَنَّهُ قَرَأَ { وَالنَّجْمِ} فَسَجَدَ فِيهَا وَسَجَدَ مَنْ كَانَ مَعَهُ غَيْرَ أَنَّ شَيْخًا أَخَذَ كَفًّا مِنْ حَصًى أَوْ تُرَابٍ فَرَفَعَهُ إِلَى جَبْهَتِهِ وَقَالَ يَكْفِينِي هَذَا . قَالَ عَبْدُ اللَّهِ لَقَدْ رَأَيْتُهُ بَعْدُ قُتِلَ كَافِرًا .
Abdullah (b. 'Umar) reported: The Apostle of Allah (ﷺ) recited (Surat) al Najm and performed prostration during its recital and all those who were along with him also prostrated themselves except one old man who took a handful of pebbles or dust in his palm and lifted it to his forehead and said: This is sufficient for me. 'Abdullah said: I saw that he was later killed in a state of unbelief. Sahih Muslim 576 [Muslim: 234 , 576]
Duas from IslamicAPI's Masnun Dua dataset (based on the Quran, hadith, Hisnul Muslim and Rahe Belayat). See the dataset