After you make wuḍū'
Whoever says it, the eight gates of Paradise are opened for him.
مَنْ قَالَ أَشْهَدُ أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ وَحْدَهُ لاَ شَرِيكَ لَهُ وَأَنَّ مُحَمَّدًا عَبْدُهُ وَرَسُولُهُ وَأَنَّ عِيسَى عَبْدُ اللَّهِ وَابْنُ أَمَتِهِ وَكَلِمَتُهُ أَلْقَاهَا إِلَى مَرْيَمَ وَرُوحٌ مِنْهُ وَأَنَّ الْجَنَّةَ حَقٌّ وَأَنَّ النَّارَ حَقٌّ أَدْخَلَهُ اللَّهُ مِنْ أَىِّ أَبْوَابِ الْجَنَّةِ الثَّمَانِيَةِ شَاءَ
Ashhadu an lā ilāha illa-llāhu waḥdahu lā sharīka lah, wa ashhadu anna Muḥammadan ʿabduhu wa rasūluh.
“I bear witness that there is no god but Allah alone, with no partner, and I bear witness that Muhammad is His servant and His Messenger.”
The full narration
It is narrated on the authority of Ubadah b. Samit that the messenger of Allah (ﷺ) observed:He who said:" There is no god but Allah, He is One and there is no associate with Him, that Muhammad is his servant and His messenger, that Christ is servant and the son of His slave-girl and he (Christ) His word which He communicated to Mary and is His Spirit, that Paradise is a fact and Hell is a fact," Allah would make him (he who affirms these truths enter Paradise through any one of its eight doors which he would like)
Source
Ṣaḥīḥ Muslim · 140
- Agreed upon as authentic (al-Bukhārī / Muslim)