question #1 Sahih Muslim 1240b, Book 15, Hadith 218 : What flexibility does Islam provide in changing the intention of Hajj to Umrah?

The Messenger of Allah (ﷺ) put on Ihigm for Hajj. When four days of Dhu’l-Hijja were over, he led the dawn prayer, and when the prayer was complete, he said: He who wants to change it to Umra may do so.