Musannaf Ibn Abi Shaybah 37675 — Amr bin Maymun

It is narrated about Amr bin Maymun that a peg used to be fixed for him in the wall of the mosque, and when he grew tired of standing in prayer and standing became hard for him, he would stay standing by leaning on that peg, or a rope would be tied to it and he would stay standing by holding on to it.