"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  

My father used to chat at night with ʿAli, and ‘Ali used to wear summer clothes in the winter and winter clothes in the summer. It was said to him: Why donʿt you ask him [about that]? He asked him and he said: The Messenger of Allah ﷺ sent for me when I had a sore eye on the day of Khaibar. I said: O Messenger of Allah, my eye is sore. He spat in my eye and said: ʿO Allah, take away heat and cold from him.” And I have never felt any heat or cold since that day. And he [the Prophet ﷺ] said: ʿI shall certainly give the banner to a man who loves Allah and his Messenger, and Allah and His Messenger love him, and he is not one to runaway.ʿ The Companions of the Prophet ﷺ hoped for it, but he gave it to me.  

كَانَ أَبِي يَسْمُرُ مَعَ عَلِيٍّ وَكَانَ عَلِيٌّ يَلْبَسُ ثِيَابَ الصَّيْفِ فِي الشِّتَاءِ وَثِيَابَ الشِّتَاءِ فِي الصَّيْفِ فَقِيلَ لَهُ لَوْ سَأَلْتَهُ؟ فَسَأَلَهُ فَقَالَ إِنَّ رَسُولَ اللهِ ﷺ بَعَثَ إِلَيَّ وَأَنَا أَرْمَدُ الْعَيْنِ يَوْمَ خَيْبَرَ فَقُلْتُ يَا رَسُولَ اللهِ إِنِّي أَرْمَدُ الْعَيْنِ قَالَ فَتَفَلَ فِي عَيْنِي وَقَالَ اللهُمَّ أَذْهِبْ عَنْهُ الْحَرَّ وَالْبَرْدَ فَمَا وَجَدْتُ حَرًّا وَلا بَرْدًا مُنْذُ يَوْمِئِذٍ وَقَالَ لاعْطِيَنَّ الرَّايَةَ رَجُلًا يُحِبُّ اللهَ وَرَسُولَهُ وَيُحِبُّهُ اللهُ وَرَسُولُهُ لَيْسَ بِفَرَّارٍ فَتَشَرَّفَ لَهَا أَصْحَابُ النَّبِيِّ ﷺ فَأَعْطَانِيهَا