"Abu Laila used to travel with 'Ali, and he used to wear summer clothes in winter and winter clothes in summer. We said: 'Why don't you ask him (about that)?' He said: "The Messenger of Allah sent for me and my eyes were sore, on the Day of Khaibar. I said: 'O Messenger of Allah, my eyes are sore.' He put some spittle into my eyes, then he said: 'O Allah, take heat and cold away from him.' I never felt hot or cold again after that day. He (the Prophet) said: 'I will send a man who loves Allah and His Messenger, and whom Allah and His Messenger love, and he is not one who flees from the battlefield.' The people craned their necks to see, and he sent for 'Ali and gave it (the banner) to him."

كَانَ أَبُو لَيْلَى يَسْمُرُ مَعَ عَلِيٍّ فَكَانَ يَلْبَسُ ثِيَابَ الصَّيْفِ فِي الشِّتَاءِ وَثِيَابَ الشِّتَاءِ فِي الصَّيْفِ فَقُلْنَا لَوْ سَأَلْتَهُ فَقَالَ إِنَّ رَسُولَ اللَّهِ ﷺ بَعَثَ إِلَىَّ وَأَنَا أَرْمَدُ الْعَيْنِ يَوْمَ خَيْبَرَ قُلْتُ يَا رَسُولَ اللَّهِ إِنِّي أَرْمَدُ الْعَيْنِ فَتَفَلَ فِي عَيْنِي ثُمَّ قَالَ اللَّهُمَّ أَذْهِبْ عَنْهُ الْحَرَّ وَالْبَرْدَ قَالَ فَمَا وَجَدْتُ حَرًّا وَلاَ بَرْدًا بَعْدَ يَوْمِئِذٍ وَقَالَ لأَبْعَثَنَّ رَجُلاً يُحِبُّ اللَّهَ وَرَسُولَهُ وَيُحِبُّهُ اللَّهُ وَرَسُولُهُ لَيْسَ بِفَرَّارٍ فَتَشَوَّفَ لَهَا النَّاسُ فَبَعَثَ إِلَى عَلِيٍّ فَأَعْطَاهَا إِيَّاهُ

[AI] He said to Ali, who was accompanying him, "Indeed, people have criticized you for going out in extreme cold while wearing thin clothing and going out in extreme heat while wearing thick clothing." Ali said, "Were you not with us at the Battle of Khaybar?" He said, "Yes." Ali said, "The Messenger of Allah ﷺ sent Abu Bakr with a battalion and he returned. Then he sent Umar with a battalion and he also returned with the people." So the Messenger of Allah ﷺ said, "I will give the flag to a man who loves Allah and His Messenger and whom Allah and His Messenger love, and he will not flee." Then he sent for me while I was sharpening my weapon. I said, "I am sharpening (my weapon), so pour some water into my eyes." And he said, "O Allah, protect him from the heat and the cold, for I have not found anyone after him who is affected by either heat or cold."

أَنَّهُ قَالَ لِعَلِيٍّ وَكَانَ يَسِيرُ مَعَهُ «إِنَّ النَّاسَ قَدْ أَنْكَرُوا مِنْكَ أَنَّكَ تَخْرُجُ فِي الْبَرْدِ فِي الْمُلَاءَتَيْنِ وَتَخْرُجُ فِي الْحَرِّ فِي الْحَشْوِ وَالثَّوْبِ الْغَلِيظِ» قَالَ «أَوَلَمْ تَكُنْ مَعَنَا بِخَيْبَرَ؟» قَالَ بَلَى قَالَ «فَإِنَّ رَسُولَ اللهِ ﷺ بَعَثَ أَبَا بَكْرٍ وَعَقَدَ لَهُ لِوَاءً فَرَجَعَ وَبَعَثَ عُمَرَ وَعَقَدَ لَهُ لِوَاءً فَرَجَعَ بِالنَّاسِ» فَقَالَ رَسُولُ اللهِ ﷺ «لَأُعْطِيَنَّ الرَّايَةَ رَجُلًا يُحِبُّ اللهَ وَرَسُولَهُ وَيُحِبُّه اللهُ وَرَسَولُهُ لَيْسَ بِفَرَّارٍ» فَأَرْسَلَ إِلَيَّ وَأنا أَرْمَدُ قُلْتُ «إِنِّي أَرْمَدُ فَتَفَلَ فِي عَيْنِي» وَقَالَ «اللهُمَّ اكْفِهِ أَذَى الْحَرِّ وَالْبَرْدِ فَمَا وَجَدْتُ حَرًّا بَعْدَ ذَلِكَ وَلَا بَرْدًا»