question #3 Sahih Muslim 704c, Book 6, Hadith 58 : What are the conditions under which a Muslim can combine the noon and afternoon prayers or the sunset and night prayers?

Anas reported that when the Messenger of Allah (ﷺ) had to set out on a journey hurriedly, he delayed the noon prayer to the earlier time for the afternoon prayer, and then he would combine them, and he would delay the sunset prayer to the time when the twilight would disappear and then combine it with the ‘Isha’ prayer.