for by Allah, if Allah guides a single person through you, that will be better for you than red camels

عَنْ سَهْلُ بْنُ سَعْدٍ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ قَالَ يَوْمَ خَيْبَرَ: «لَأُعْطِيَنَّ هَذِهِ الرَّايَةَ غَدًا رَجُلًا يَفْتَحُ اللَّهُ عَلَى يَدَيْهِ، يُحِبُّ اللَّهَ وَرَسُولَهُ وَيُحِبُّهُ اللَّهُ وَرَسُولُهُ»، قَالَ: فَبَاتَ النَّاسُ يَدُوكُونَ لَيْلَتَهُمْ أَيُّهُمْ يُعْطَاهَا، فَلَمَّا أَصْبَحَ النَّاسُ غَدَوْا عَلَى رَسُولِ اللَّهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ كُلُّهُمْ يَرْجُو أَنْ يُعْطَاهَا، فَقَالَ: «أَيْنَ عَلِيُّ بْنُ أَبِي طَالِبٍ؟» فَقِيلَ: هُوَ يَا رَسُولَ اللَّهِ يَشْتَكِي عَيْنَيْهِ، قَالَ: «فَأَرْسِلُوا إِلَيْهِ»، فَأُتِيَ بِهِ فَبَصَقَ رَسُولُ اللَّهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ فِي عَيْنَيْهِ وَدَعَا لَهُ، فَبَرَأَ حَتَّى كَأَنْ لَمْ يَكُنْ بِهِ وَجَعٌ، فَأَعْطَاهُ الرَّايَةَ، فَقَالَ عَلِيٌّ: يَا رَسُولَ اللَّهِ، أُقَاتِلُهُمْ حَتَّى يَكُونُوا مِثْلَنَا؟ فَقَالَ: «انْفُذْ عَلَى رِسْلِكَ حَتَّى تَنْزِلَ بِسَاحَتِهِمْ، ثُمَّ ادْعُهُمْ إِلَى الإِسْلاَمِ، وَأَخْبِرْهُمْ بِمَا يَجِبُ عَلَيْهِمْ مِنْ حَقِّ اللَّهِ فِيهِ، فَوَاللَّهِ لَأَنْ يَهْدِيَ اللَّهُ بِكَ رَجُلًا وَاحِدًا، خَيْرٌ لَكَ مِنْ أَنْ يَكُونَ لَكَ حُمْرُ النَّعَمِ».

Sahl ibn Sa‘d (may Allah be pleased with him) reported that the Messenger of Allah (may Allah's peace and blessings be upon him) said on the Day of Khaybar: "Verily, I shall give this banner tomorrow to a man at whose hands Allah will grant victory; He loves Allah and His Messenger, and Allah and His Messenger love him." He said: People spent their night conversing and talking as to whom it would be given. In the morning, people went to the Messenger of Allah (may Allah's peace and blessings be upon him), all of them hoping to be given the banner. He said: "Where is ‘Ali ibn Abi Tālib?" It was said: O Messenger of Allah, he is suffering from sore eyes. He said: "Send for him." He was, thus, brought, and the Messenger of Allah (may Allah's peace and blessings be upon him) spat into his eyes and supplicated for him. Thereupon, he recovered as if he had suffered no pain at all, so he gave him the banner. ‘Ali said: O Messenger of Allah, should I fight them until they are like us? He said: "Proceed steadily until you reach their courtyard, then, call them to Islam and inform them of what is obligatory upon them from the rights of Allah therein, for by Allah, if Allah guides a single person through you, that will be better for you than red camels."

Agreed upon · hadeethenc:3409

Grading: Authentic (as published by the source; the grader is not named)