The Messenger of Allah ﷺ entered the masjid and saw a rope tied between two pillars. He said: "What is this?" They said: "It is for Zainab when she prays; if she gets tired she holds on to it." The Prophet ﷺ said: "Untie it. Let any one of you pray as long as he has energy, and if he gets tired let him sit down."
أَنَّ رَسُولَ اللَّهِ ﷺ دَخَلَ الْمَسْجِدَ فَرَأَى حَبْلاً مَمْدُودًا بَيْنَ سَارِيَتَيْنِ فَقَالَ مَا هَذَا الْحَبْلُ فَقَالُوا لِزَيْنَبَ تُصَلِّي فَإِذَا فَتَرَتْ تَعَلَّقَتْ بِهِ فَقَالَ النَّبِيُّ ﷺ حُلُّوهُ لِيُصَلِّ أَحَدُكُمْ نَشَاطَهُ فَإِذَا فَتَرَ فَلْيَقْعُدْ