أَخْبَرَنَا عِمْرَانُ بْنُ مُوسَى، عَنْ عَبْدِ الْوَارِثِ، قَالَ حَدَّثَنَا عَبْدُ الْعَزِيزِ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم دَخَلَ الْمَسْجِدَ فَرَأَى حَبْلاً مَمْدُودًا بَيْنَ سَارِيَتَيْنِ فَقَالَ " مَا هَذَا الْحَبْلُ " . فَقَالُوا لِزَيْنَبَ تُصَلِّي فَإِذَا فَتَرَتْ تَعَلَّقَتْ بِهِ . فَقَالَ النَّبِيُّ صلى الله عليه وسلم " حُلُّوهُ لِيُصَلِّ أَحَدُكُمْ نَشَاطَهُ فَإِذَا فَتَرَ فَلْيَقْعُدْ " .
It was narrated from Anas bin Malik that: The Messenger of Allah (PBUH) 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 (PBUH) said: "Untie it. Let any one of you pray as long as he has energy, and if he gets tired let him sit down." Translation Not Available
Book Ref: Sunan An Nisai Book 20 Hadith 1643
Web Ref: Sunan An Nisai Vol 2 Book 20 Hadith 1644