The World Federation One Stop Fiqh

Ritual 332

If a pilgrim is unaware that his recitation is not sound, and his ignorance is excusable, his prayer is valid; there shall be no need for him to say it again, even if he comes to know of the lapse after the prayer.

If his ignorance was not excusable, he must, after correcting his error, say the tawaf prayer again; the rules governing a person who has forgotten to say the prayer shall apply to him.