Continuity in Sa’i is not a necessary condition for its validity. (Malik holds. however. that continuity of Sa`i, without a long break, is a necessary condition for it) Thus if a pilgrim stops Sa’i (between Safa and Marwah) for some reason, e.g., it is prayer time and he joins the congregation, in all such cases he may resume his Sa’i when the reason forcing him to stop is no longer there, and begin from where he had left it.
It is reported that Ibn ‘Umar used to perform Sa’i between Safa and Marwah, and whenever he had to answer the call of nature, he would stop, relieve himself, make ablution, and then go back and resume his Sa’i, (Reported by Sa’id bin Mansur) because the continuity in Sa’i is not required.
The author of Al-Mughni observes: “Ahmad says there is no harm in delaying the Sa’i after performing tauaf until one is rested, or postponing it until evening. ‘Ata and Al-Hasan also see no harm in someone making tawaf early in the day and postponing the Sa’i between Safa and Marwah until evening. Al-Qasim and Sa’id bin Jubair followed this, because the continuity of Sa’i is, as such, not a condition, much less the continuity of tawaf and Sa’i.
Sa’id bin Mansur reported that Saudah, the wife of ‘Urwah bin al-Zubair performed Sa ‘i between Safa and Marwah and because she was a big and heavy woman, she completed it in three days.