The Messenger of Allah (ﷺ) observed the noon and afternoon prayers together, and the sunset and Isha' prayers together without being in a state of fear or in a state of journey.
Sahih Muslim Book 6, Hadith 59
← Previous Hadith 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.

Sahih Muslim Book 6, Hadith 58 Next Hadith → The Messenger of Allah (ﷺ) observed the noon and afternoon prayers together in Medina without being in a state of fear or in a state of journey. (Abu Zubair said: I asked Sa'id hardship.)

Sahih Muslim Book 6, Hadith 60