The World Federation One Stop Fiqh

Ruling 370

A person in the state of iḥrām39 for hajj or ʿumrah must not perform immersive ghusl. However, if he forgetfully performs immersive ghusl, his ghusl is valid.

39 Iḥrām here refers to the state of ritual consecration of pilgrims during hajj and ʿumrah