question #3 Sahih Muslim 1240d, Book 15, Hadith 220 : What does this event teach about the flexibility and adaptability in Islamic rituals?

Allah’s Messenger (ﷺ) came along with his Companions when four days had passed out of ten days (of Dhu’l-Hijja) and they were pronouncing Talbiya for Hajj, and he (the Holy Prophet) commanded them to change (this Ihram) into that of ‘Umra.