[Machine] Al-Shafi'i in his Sunan Haramlah argues that excuse can be granted due to travel or rain. However, this is not a fixed ruling confirmed by Umar. The Sheik states that it is as Al-Shafi'i said, and the famous chain of transmission for this narration is what we have mentioned, but it is also a mursal narration from Abu Al-Alaya. He did not hear this from Umar. In another chain of transmission, it has been narrated that Al-Shafi'i referred to his text in some of his books.  

الشَّافِعِيُّ فِي سُنَنِ حَرْمَلَةَ الْعُذْرُ يَكُونُ بِالسَّفَرِ وَالْمَطَرِ وَلَيْسَ هَذَا بِثَابِتٍ عَنْ عُمَرَ هُوَ مُرْسَلٌ قَالَ الشَّيْخُ هُوَ كَمَا قَالَ الشَّافِعِيُّ وَالْإِسْنَادُ الْمَشْهُورُ لِهَذَا الْأَثَرِ مَا ذَكَرْنَا وَهُوَ مُرْسَلٌ أَبُو الْعَالِيَةِ لَمْ يَسْمَعْ مِنْ عُمَرَ ؓ وَقَدْ رُوِيَ ذَلِكَ بِإِسْنَادٍ آخَرَ قَدْ أَشَارَ الشَّافِعِيُّ إِلَى مَتْنِهِ فِي بَعْضِ كُتُبِهِ  

[Machine] About the Prophet ﷺ , in his chain of narrators, the one who is not referred to.  

عَنِ النَّبِيِّ ﷺ فِي إِسْنَادِهِ مَنْ لَا يُحْتَجُّ بِهِ  

[Machine] The Messenger of Allah, ﷺ , said: The combination of the prayers without a valid excuse is considered a major sin. This statement is from the narration of Nuaim. And in the narration of Ya'qub, whoever combines the prayers without a valid excuse has committed one of the major sins. Husayn ibn Qais Abu Ali Al-Rahbi, known as Hanash, singled out this narration and used it, but he is weak according to the scholars of narration and his report cannot be relied upon.  

قَالَ رَسُولُ اللهِ ﷺ الْجَمْعُ بَيْنَ الصَّلَاتَيْنِ مِنْ غَيْرِ عُذْرٍ مِنَ الْكَبَائِرِ لَفْظُ حَدِيثِ نُعَيْمٍ وَفِي رِوَايَةِ يَعْقُوبَ مَنْ جَمَعَ بَيْنَ الصَّلَاتَيْنِ مِنْ غَيْرِ عُذْرٍ فَقَدْ أَتَى بَابًا مِنْ أَبْوَابِ الْكَبَائِرِ تَفَرَّدَ بِهِ حُسَيْنُ بْنُ قَيْسٍ أَبُو عَلِيٍّ الرَّحَبِيُّ الْمَعْرُوفُ بِحَنَشٍ وَهُوَ ضَعِيفٌ عِنْدَ أَهْلِ النَّقْلِ لَا يُحْتَجُّ بِخَبَرِهِ