"I saw Messenger of Allah ﷺ delaying the Maghrib prayer till he offered it along with the ʿIsha' prayer whenever he was in a hurry during the journey." Salim narrated, "Ibn ʿUmar used to do the same whenever he was in a hurry during the journey." And Salim added, "Ibn ʿUmar used to pray the Maghrib and ʿIsha' prayers together in Al-Muzdalifa." Salim said, "Ibn ʿUmar delayed the Maghrib prayer because at that time he heard the news of the death of his wife Safiya bint Abi ʿUbaid. I said to him, 'The prayer (is due).' He said, 'Go on.' Again I said, 'The prayer (is due).' He said, 'Go on,' till we covered two or three miles. Then he got down, prayed and said, 'I saw the Prophet ﷺ praying in this way, whenever he was in a hurry during the journey.' ʿAbdullah (bin ʿUmar) added, "Whenever the Prophet was in a hurry, he used to delay the Maghrib prayer and then offer three rakʿat (of the Maghrib) and perform Taslim, and after waiting for a short while, Iqama used to be pronounced for the ʿIsha' prayer when he would offer two rakʿat and perform Taslim. He would never offer any optional prayer till the middle of the night (when he used to pray the Tahajjud)."  

رَأَيْتُ رَسُولَ اللَّهِ ﷺ إِذَا أَعْجَلَهُ السَّيْرُ فِي السَّفَرِ يُؤَخِّرُ الْمَغْرِبَ حَتَّى يَجْمَعَ بَيْنَهَا وَبَيْنَ الْعِشَاءِ قَالَ سَالِمٌ وَكَانَ عَبْدُ اللَّهِ يَفْعَلُهُ إِذَا أَعْجَلَهُ السَّيْرُ وَزَادَ اللَّيْثُ قَالَ حَدَّثَنِي يُونُسُ عَنِ ابْنِ شِهَابٍ قَالَ سَالِمٌ كَانَ ابْنُ عُمَرَ ؓ يَجْمَعُ بَيْنَ الْمَغْرِبِ وَالْعِشَاءِ بِالْمُزْدَلِفَةِ قَالَ سَالِمٌ وَأَخَّرَ ابْنُ عُمَرَ الْمَغْرِبَ وَكَانَ اسْتُصْرِخَ عَلَى امْرَأَتِهِ صَفِيَّةَ بِنْتِ أَبِي عُبَيْدٍ فَقُلْتُ لَهُ الصَّلاَةُ فَقَالَ سِرْ فَقُلْتُ الصَّلاَةُ فَقَالَ سِرْ حَتَّى سَارَ مِيلَيْنِ أَوْ ثَلاَثَةً ثُمَّ نَزَلَ فَصَلَّى ثُمَّ قَالَ هَكَذَا رَأَيْتُ النَّبِيَّ ﷺ يُصَلِّي إِذَا أَعْجَلَهُ السَّيْرُ وَقَالَ عَبْدُ اللَّهِ رَأَيْتُ النَّبِيَّ ﷺ إِذَا أَعْجَلَهُ السَّيْرُ يُؤَخِّرُ الْمَغْرِبَ فَيُصَلِّيهَا ثَلاَثًا ثُمَّ يُسَلِّمُ ثُمَّ قَلَّمَا يَلْبَثُ حَتَّى يُقِيمَ الْعِشَاءَ فَيُصَلِّيَهَا رَكْعَتَيْنِ ثُمَّ يُسَلِّمُ وَلاَ يُسَبِّحُ بَعْدَ الْعِشَاءِ حَتَّى يَقُومَ مِنْ جَوْفِ اللَّيْلِ