مناسك حج - مكارم شيرازى، ناصر - الصفحة ١٣٦ - Mustahab Tawafs
Mustahab Tawaf is similar to obligatory( Wajib )Tawaf but it differs that in the following items:
١- Purity( Taharah )is not a condition of Mustahab Tawaf, although it is better to perform it with ablution, and ablution is necessary for the prayer of Tawaf.
٢- The prayer of Mustahab Tawaf can be performed anywhere in Masjid al- Haraam.
٣- Observing the sequence is not necessary in Mustahab Tawaf.
٤- Stopping Mustahab Tawaf is permitted without any excuse or necessity, although the person does not want to perform other rounds. But it is obligatory precaution not to stop obligatory Tawaf except the cases of necessity.
٥- Doubt about the deficiency of rounds of Mustahab Tawaf is not important and the lesser round could be considered.
٦- Qiran( performing two Tawaf after each other immediately, without performing the prayer of Tawaf between them )is not permitted in obligatory Tawaf but it is Makrooh) disliked (in Mustahab Tawaf.