Sunan Ibn Majah, Volume 2, Book 5, Hadith 1371 (DarusSalam) ⓘ

It was narrated from Anas bin Malik that the Messenger of Allah entered the mosque and saw a rope tied between two pillars. He said, “What is this rope?” They said: “It belongs to Zainab. She prays here and when she gets tired she holds on to it.” He said: “Untie it, untie it; let any one of you pray when he has energy, if he gets tired let him sit down.”

حَدَّثَنَا عِمْرَانُ بْنُ مُوسَى اللَّيْثِيُّ، حَدَّثَنَا عَبْدُ الْوَارِثِ بْنُ سَعِيدٍ، عَنْ عَبْدِ الْعَزِيزِ بْنِ صُهَيْبٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ دَخَلَ الْمَسْجِدَ فَرَأَى حَبْلاً مَمْدُودًا بَيْنَ سَارِيَتَيْنِ فَقَالَ ‏"‏ مَا هَذَا الْحَبْلُ ‏"‏ ‏.‏ قَالُوا لِزَيْنَبَ تُصَلِّي فِيهِ فَإِذَا فَتَرَتْ تَعَلَّقَتْ بِهِ ‏.‏ فَقَالَ ‏"‏ حُلُّوهُ حُلُّوهُ لِيُصَلِّ أَحَدُكُمْ نَشَاطَهُ فَإِذَا فَتَرَ فَلْيَقْعُدْ ‏"‏ ‏.‏