Musannaf Ibn Abi Shaybah 32428 — Book of Faith

Wa'il bin Mahanah (may Allah have mercy on him) said that Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) said: I have not seen anyone deficient in religion and judgement who overpowers men of authority in their affairs more than women do. The people said: "O Abu Abd al-Rahman! What is the deficiency in their religion?" He (may Allah be pleased with him) said: "Their abandoning the prayer during the days of their menstruation." The people said: "And what is the deficiency in their intellect?" He (may Allah be pleased with him) said: "The testimony of two women is not valid except along with the testimony of one man."