Musannaf Ibn Abi Shaybah 12947 — A woman who vowed to pray in fifty

Murrah said: I entered the mosque, saying to myself that I would pray two rak'ahs at every pillar. A man was watching me closely, and I was not aware of him. When I sat down, I looked and saw Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) seated, so I came to him and sat down beside him. The man who had been watching me was with him, and he was not aware of where I was. He said: "O Abu Abd al-Rahman, a man entered the mosque and began praying two rak'ahs at every pillar." He said: "If he knew that Allah Almighty is at the very first pillar, he would not move from there until he had completed his prayer." Murrah said: So I abandoned the rest of what I had intended to pray.