Update: Previously the Arabic text did not match the English translation.
Hadith: Arabic Text followed by English Translation.
عَنْ عُقْبَةَ بْنِ عَامِرٍ، قَالَ كَانَتْ عَلَيْنَا رِعَايَةُ الإِبِلِ فَجَاءَتْ نَوْبَتِي فَرَوَّحْتُهَا بِعَشِيٍّ فَأَدْرَكْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم قَائِمًا يُحَدِّثُ النَّاسَ فَأَدْرَكْتُ مِنْ قَوْلِهِ:
مَا مِنْ مُسْلِمٍ يَتَوَضَّأُ فَيُحْسِنُ وُضُوءَهُ ثُمَّ يَقُومُ فَيُصَلِّي رَكْعَتَيْنِ مُقْبِلٌ عَلَيْهِمَا بِقَلْبِهِ وَوَجْهِهِ إِلاَّ وَجَبَتْ لَهُ الْجَنَّةُ
رواه مسلم 234
Uqba b. ‘Amir reported:
We were entrusted with the task of tending the camels. On my turn when I came back in the evening after grazing them in the pastures, I found Allah’s Messenger (ﷺ) stand and address the people. I heard these words of his:
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.
Sahih Muslim 234.