The Book of Purification
Sunan an-Nasā'ī 148
لاَ إِلَهَ إِلاَّ اللَّهُ وَأَشْهَدُ أَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُولُهُ فُتِّحَتْ لَهُ ثَمَانِيَةُ أَبْوَابِ الْجَنَّةِ يَدْخُلُ مِنْ أَيِّهَا شَاءَ
lā ilaha illā-Llāh wa-ashhadu anna muḥammadan ʿabduhu warasūluhu futtiḥat lah thamāniyah abwābi al-jannah yadkhulu min ayyihā shāʾa
Transliteration generated from the Arabic vowel marks
The full narration
It was narrated that 'Umar bin Al-Khattab said:"The Messenger of Allah (ﷺ) said: 'Whoever performs Wudu' and does it well, then says: "Ashhadu an la ilaha ill-Allah was ashhadu anna Muhammadan 'abduhu wa rasuluh (I bear witness that there is none worthy of worship except Allah, and I bear witness that Muhammad is his slave and Messenger)," eight gates of Paradise will be opened for him, and he may enter through whichever one he wishes
Source
Sunan an-Nasā'ī · 148
- Abu Ghuddah: Sahih
- Al-Albani: Sahih
- Zubair Ali Zai: Sahih Muslim