from the Prophet—may Allah bless him and grant him peace—that he made purification a condition for tawaf, nor that he prohibited (1) a person in minor impurity from circumambulating; he simply performed tawaf while in a state of purity (2). However (3), it is soundly reported that he forbade a menstruating woman to perform tawaf (4).
The Prophet—peace and blessings be upon him—also said:
“The key to prayer is purification; its inviolability begins with the opening takbir, and its release is the taslim.” (5)
Therefore, the acts of prayer for which purification is obligatory are those that open with the takbir and conclude with the taslim: the regular prayer that includes bowing and prostration, the funeral prayer (6), and the two prostrations for forgetfulness. Tawaf and the prostration of Qur’an recitation, however, do not fall under this ruling (7). Iʿtikāf must take place in a mosque, yet by unanimous agreement it does not require ritual purity; and a woman in iʿtikāf who begins menstruating is instructed not to remain in the mosque while the bleeding continues, even if