Were you to die you would die on a "Sunna" (legal way) other than that of Muhammad ﷺ."
عَنْ حُذَيْفَةَ رَأَى رَجُلاً لاَ يُتِمُّ رُكُوعَهُ وَلاَ سُجُودَهُ فَلَمَّا قَضَى صَلاَتَهُ قَالَ لَهُ حُذَيْفَةُ مَا صَلَّيْتَ قَالَ وَأَحْسِبُهُ قَالَ لَوْ مُتَّ مُتَّ عَلَى غَيْرِ سُنَّةِ مُحَمَّدٍ ﷺ
Ḥudhayfah saw a person who was not bowing and prostrating perfectly ˹in prayer˺. He said to him, "You have not prayed; and if you should die you would die on a fiṭrah (natural disposition) other than that of the fiṭrah of Muhammad ﷺ."
رَأَى حُذَيْفَةُ رَجُلاً لاَ يُتِمُّ الرُّكُوعَ وَالسُّجُودَ قَالَ: مَا صَلَّيْتَ؛ وَلَوْ مُتَّ، مُتَّ عَلَى غَيْرِ الْفِطْرَةِ الَّتِي فَطَرَ اللَّهُ مُحَمَّدًا ﷺ۔
Hudhaifa said, "I saw a person not performing his bowing and prostrations perfectly. When he completed the prayer, I told him that he had not prayed." I think that Hudhaifa added (i.e. said to the man), "Had you died, you would have died on a tradition other than that of the Prophet ﷺ Muhammad."
عَنْ حُذَيْفَةَ رَأَى رَجُلاً لاَ يُتِمُّ رُكُوعَهُ وَلاَ سُجُودَهُ فَلَمَّا قَضَى صَلاَتَهُ قَالَ لَهُ حُذَيْفَةُ مَا صَلَّيْتَ قَالَ وَأَحْسِبُهُ قَالَ وَلَوْ مُتَّ مُتَّ عَلَى غَيْرِ سُنَّةِ مُحَمَّدٍ ﷺ