[Machine] He was sitting with the Messenger of Allah when a man came and entered the mosque and prayed. When he finished his prayer, he greeted the Messenger of Allah and the people. The Messenger of Allah said to him, "Peace be upon you, go back and pray, for you have not prayed." And he mentioned the hadith about teaching the Prophet to pray it. In it, he said, "Then he makes takbeer, prostrates, and places his forehead on the ground until his joints are relaxed and aligned."  

أَنَّهُ كَانَ جَالِسًا عِنْدَ رَسُولِ اللهِ ﷺ إِذْ جَاءَ رَجُلٌ فَدَخَلَ الْمَسْجِدَ فَصَلَّى فَلَمَّا قَضَى صَلَاتَهُ جَاءَ فَسَلَّمَ عَلَى رَسُولِ اللهِ ﷺ وَعَلَى الْقَوْمِ فَقَالَ لَهُ رَسُولُ اللهِ ﷺ وَعَلَيْكَ السَّلَامُ ارْجِعْ فَصَلِّ فَإِنَّكَ لَمْ تُصَلِّ وَذَكَرَ الْحَدِيثَ فِي تَعْلِيمِ النَّبِيِّ ﷺ إِيَّاهُ قَالَ فِيهِ ثُمَّ يُكَبِّرُ فَيَسْجُدُ فَيُمَكِّنُ جَبْهَتَهُ مِنَ الْأَرْضِ حَتَّى تَطْمَئِنَّ مَفَاصِلُهُ وَتَسْتَوِيَ