The Prophet ﷺ said, "Perform the bowing and the prostrations properly. By Allah, I see you from behind me (or from behind my back) when you bow or prostrate." (Using translation from Bukhārī 742)
عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ أَتِمُّوا الرُّكُوعَ وَالسُّجُودَ فَوَاللهِ إِنِّي لَأَرَاكُمْ مِنْ بَعْدِي وَرُبَّمَا قَالَ مِنْ بَعْدِ ظَهْرِي إِذَا رَكَعْتُمْ وَسَجَدْتُمْ