[Machine] Indeed, one of us may pray without knowing how much he has prayed. So he said, the Messenger of Allah ﷺ said, "If one of you prays and does not know how much he has prayed, then let him perform two prostrations while sitting. And when one of you is approached by Satan and he says, 'You have done something new in your prayer,' then let him say, 'I have not done anything new except that I sensed a smell with my nose or heard a sound with my ear.'"
إِنَّ أَحَدَنَا يُصَلِّي فَلَا يَدْرِي كَمْ صَلَّى؟ فَقَالَ قَالَ رَسُولُ اللهِ ﷺ إِذَا صَلَّى أَحَدُكُمْ فَلَمْ يَدْرِ كَمْ صَلَّى فَلْيَسْجُدْ سَجْدَتَيْنِ وَهُوَ جَالِسٌ فَإِذَا جَاءَ أَحَدَكُمُ الشَّيْطَانُ فَقَالَ إِنَّكَ قَدْ أَحْدَثْتَ فِي صَلَاتِكَ فَلْيَقُلْ كَذَبْتَ إِلَّا مَا وَجَدَ رِيحًا بِأَنْفِهِ أَوْ سَمِعَ صَوْتًا بِأُذُنِهِ