Does a state of ritual impurity during tawaf invalidate the entire tawaf?

Question:
(peace and blessings be upon him) Your Eminence, the father, the questioner says: If a pilgrim becomes ritually impure while he is in the middle of tawaf, does he have to repeat the tawaf, or does he complete it from the lap in which he became impure?

Answer:
No, if he becomes ritually impure during the tawaf, his entire tawaf is invalid, just as if he becomes ritually impure in the last rak'ah of a prayer, the entire prayer is invalid. So he performs wudu' and repeats the tawaf from the beginning, exactly like the prayer.