«الطَّوَافُ بِالْبَيْتِ صَلَاةٌ»
Circumambulation of the House is comparable to prayer.
The comparison supports the importance of purification. In Hanafi legal analysis, the obligatory tawaf and the separate duty of purity need not have identical evidentiary rank. Depending on the circumstances, repetition or compensatory sacrifice can arise without holding that the basic tawaf never occurred.
Other schools may regard purity as a condition of validity. These are descriptive accounts of classical jurisprudence rather than an individualized pilgrimage ruling.