He saw a man praying (And his bowing and prostration) were lacking. Hudhaifah said to him: 'For how long have you been praying like this?' He said: "For forty years.' He said: 'You have not been praying for forty years and if you die praying like this, you will have died following a path other than the path of Muhammad ﷺ. Then he said: 'It is possible for a man to pray briefly, but still do it properly."  

لَهُ حُذَيْفَةُ مُنْذُ كَمْ تُصَلِّي هَذِهِ الصَّلاَةَ قَالَ مُنْذُ أَرْبَعِينَ عَامًا قَالَ مَا صَلَّيْتُ مُنْذُ أَرْبَعِينَ سَنَةً وَلَوْ مِتَّ وَأَنْتَ تُصَلِّي هَذِهِ الصَّلاَةَ لَمِتَّ عَلَى غَيْرِ فِطْرَةِ مُحَمَّدٍ ﷺ ثُمَّ قَالَ إِنَّ الرَّجُلَ لَيُخَفِّفُ وَيُتِمُّ وَيُحْسِنُ  

[Machine] Hudhayfah entered the mosque and found a man praying near the windows of Kindah. He noticed that the man did not complete his bowing or prostration. After the man finished, Hudhayfah asked him, "How long have you been performing this prayer?" The man replied, "For forty years." Hudhayfah then said, "You have not prayed for forty years. If you were to die, your prayer would not be valid unless you prayed in the manner that the Prophet Muhammad ﷺ prayed." Then Hudhayfah approached him and taught him the correct way to perform the prayer and said, "Indeed, a person may cheat in their prayer, and yet they still complete the bowing and prostration."  

دَخَلَ حُذَيْفَةُ الْمَسْجِدَ فَإِذَا رَجُلٌ يُصَلِّي مِمَّا يَلِي أَبْوَابَ كِنْدَةَ فَجَعَلَ لَا يُتِمُّ الرُّكُوعَ وَلَا السُّجُودَ فَلَمَّا انْصَرَفَ قَالَ لَهُ حُذَيْفَةُ مُنْذُ كَمْ هَذِهِ صَلَاتُكَ؟ قَالَ مُنْذُ أَرْبَعِينَ سَنَةً قَالَ فَقَالَ لَهُ حُذَيْفَةُ مَا صَلَّيْتَ مُنْذُ أَرْبَعِينَ سَنَةً وَلَوْ مُتَّ وَهَذِهِ صَلَاتُكَ لَمُتَّ عَلَى غَيْرِ الْفِطْرَةِ الَّتِي فُطِرَ عَلَيْهَا مُحَمَّدٌ ﷺ قَالَ ثُمَّ أَقْبَلَ عَلَيْهِ يُعَلِّمُهُ فَقَالَ إِنَّ الرَّجُلَ لَيُخِفُّ فِي صَلَاتِهِ وَإِنَّهُ لَيُتِمُّ الرُّكُوعَ وَالسُّجُودَ