The World Federation One Stop Fiqh

Ritual 324

If a pilgrim forgets to perform tawaf, and remembers it when there is still the opportunity to perform it by way of qadha, he should undertake it in his former ihram, i.e. there will be no need to renew it.

However, if he has already left Makkah, it is necessary to wear a new ihram in order to enter it, except for the cases explained in Rule 141.