(18) باب مَا يُكْرَهُ مِنَ التَّشْدِيدِ فِي الْعِبَادَةِ
Narrated Anas bin MalikOnce the Prophet (p.b.u.h) entered the Mosque and saw a rope hanging in between its two pillars. He said, "What is this rope?" The people said, "This rope is for Zainab who, when she feels tired, holds it (tokeep standing for the prayer.)" The Prophet (ﷺ) said, "Don't use it. Remove the rope. You should pray as long as you feel active, and when you get tired, sit down."
Reference: Sahih al-Bukhari 1150
In-book reference: Book 19, Hadith 31
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 21, Hadith 251