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. (Using translation from Muslim 705a)
«صَلَّى رَسُولُ اللهِ ﷺ الظُّهْرَ وَالْعَصْرَ جَمِيعًا وَالْمَغْرِبَ وَالْعِشَاءَ جَمِيعًا مِنْ غَيْرِ خَوْفٍ وَلَا سَفَرٍ»
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.
صَلَّى رَسُولُ اللَّهِ ﷺ الظُّهْرَ وَالْعَصْرَ جَمِيعًا وَالْمَغْرِبَ وَالْعِشَاءَ جَمِيعًا فِي غَيْرِ خَوْفٍ وَلاَ سَفَرٍ
We set out with the Messenger of Allah ﷺ on the Tabuk expedition, and he observed the noon and afternoon prayers together and the sunset and 'Isha' prayers together.
خَرَجْنَا مَعَ رَسُولِ اللَّهِ ﷺ فِي غَزْوَةِ تَبُوكَ فَكَانَ يُصَلِّي الظُّهْرَ وَالْعَصْرَ جَمِيعًا وَالْمَغْرِبَ وَالْعِشَاءَ جَمِيعًا
"The Messenger of Allah ﷺ prayed Zuhr and 'Asr together, and Maghrib and 'Isha' together, when there was no fear and he was not traveling."
صَلَّى رَسُولُ اللَّهِ ﷺ الظُّهْرَ وَالْعَصْرَ جَمِيعًا وَالْمَغْرِبَ وَالْعِشَاءَ جَمِيعًا مِنْ غَيْرِ خَوْفٍ وَلاَ سَفَرٍ
The Messenger of Allah ﷺ combined the noon and the afternoon prayers, and combined the sunset and night prayers without any danger or journey. Malik said: I think it so happened during rain. Abu Dawud said: Hammad b. Salamah narrated it like manner from Abu al-Zubair, it has also been narrated by Qurrah b. Khalid from Abu al-Zubair. He said: It is so happened in a journey that we made to Tabuk.
صَلَّى رَسُولُ اللَّهِ ﷺ الظُّهْرَ وَالْعَصْرَ جَمِيعًا وَالْمَغْرِبَ وَالْعِشَاءَ جَمِيعًا فِي غَيْرِ خَوْفٍ وَلاَ سَفَرٍ قَالَ مَالِكٌ أُرَى ذَلِكَ كَانَ فِي مَطَرٍ
Yahya related to me from Malik from Abu'z Zubayr al-Makki from Said ibn Jubayr that Abdullah ibn Abbas said, "The Messenger of Allah ﷺ prayed dhuhr and asr together and maghrib and isha together, and not out of fear nor because of travelling."
أَنَّهُ قَالَ صَلَّى رَسُولُ اللَّهِ ﷺ الظُّهْرَ وَالْعَصْرَ جَمِيعًا وَالْمَغْرِبَ وَالْعِشَاءَ جَمِيعًا فِي غَيْرِ خَوْفٍ وَلاَ سَفَرٍ
[Machine] The Messenger of Allah ﷺ used to combine the prayers during travel, for Maghrib and Isha, and also Dhuhr and Asr.
كَانَ رَسُولُ اللهِ ﷺ يَجْمَعُ بَيْنَ الصَّلاتَيْنِ فِي السَّفَرِ الْمَغْرِبِ وَالْعِشَاءِ وَالظُّهْرِ وَالْعَصْرِ
"The Messenger of Allah ﷺ prayed Zuhr and 'Asr together, and Maghrib and 'Isha' together, when there was no fear and he was not traveling." (Using translation from Nasāʾī 601)
«صَلَّى رَسُولُ اللَّهِ ﷺ الظُّهْرَ وَالْعَصْرَ جَمِيعًا وَالْمَغْرِبَ وَالْعِشَاءَ جَمِيعًا فِي غَيْرِ خَوْفٍ وَلَا سَفَرٍ»