We went out with the Messenger of Allah (sallallahu alayhi wa sallam) on the Tabuk expedition, and he would offer Zuhr and Asr prayers together and Magbrib and Isha prayers together.
وَعَنْ مُعَاذٍ رضى الله عنه
قَالَ: «خَرَجْنَا مَعَ رَسُولِ اَللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي غَزْوَةِ تَبُوكَ، فَكَانَ يُصَلِّي اَلظُّهْرَ وَالْعَصْرَ جَمِيعًا، وَالْمَغْرِبَ وَالْعِشَاءَ جَمِيعًا»
We went out with the Messenger of Allah (sallallahu alayhi wa sallam) on the Tabuk expedition, and he would offer Zuhr and Asr prayers together and Magbrib and Isha prayers together.
صحيح. رواه مسلم (706) وزاد: «قال: فقلت: ما حمله على ذلك؟ قال: فقال: أراد أن لا يحرج أمته»
Who passed it on, from Ibn Hajar back to the one who was there.
The same words, in another collection.
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