The Messenger of Allah ﷺ as saying: If anyone's last words are "There is no god but Allah" he will enter Paradise.  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ كَانَ آخِرُ كَلاَمِهِ لاَ إِلَهَ إِلاَّ اللَّهُ دَخَلَ الْجَنَّةَ  

The Messenger of Allah ﷺ as saying: Recite to those of you who are dying "There is no god but Allah."  

قَالَ رَسُولُ اللَّهِ ﷺ لَقِّنُوا مَوْتَاكُمْ قَوْلَ لاَ إِلَهَ إِلاَّ اللَّهُ