Sunan al-Nasa'i — The Book of the Times (of Prayer)

“If the Messenger of Allah (ﷺ) was in a hurry to travel, or some emergency arose, he would combine Maghrib and ‘Isha’.”

“Anas bin Malik was asked: ‘Did the Prophet wear a ring?’ He said: ‘Yes.’ One night he delayed the ‘Isha’ prayer until almost the middle of the night. When he had prayed, he turned to face us and said: ‘The people have prayed and gone to sleep, but you will still be in a state of prayer so long as you are waiting for the (next) prayer.'” (Sahih)Anas said: “It was as if I can see the sparkle from his ring.'”