When the Messenger of Allah ﷺ bowed, if a glass of water were placed on his back it would not spill.
كَانَ النَّبِيُّ ﷺ إِذَا رَكَعَ لَوْ وُضِعَ قَدَحٌ مِنْ مَاءٍ عَلَى ظَهْرِهِ لَمْ يُهَرَاقْ
When the Messenger of Allah ﷺ bowed, if a glass of water were placed on his back it would not spill.
كَانَ النَّبِيُّ ﷺ إِذَا رَكَعَ لَوْ وُضِعَ قَدَحٌ مِنْ مَاءٍ عَلَى ظَهْرِهِ لَمْ يُهَرَاقْ
"عَنْ عَلِى قَالَ: كَانَ النَّبِي ﷺ إذَا رَكَعَ لَوْ وُضِعَ قَدَحٌ مِنْ مَاءٍ عَلَى ظَهْرِهِ لَمْ يُهْرَاق".