It is narrated from Sayyiduna Sahl bin Sa’d (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said on the day of Khaybar:“Tomorrow I will give the flag to the person at whose hand Allah will grant victory.”The companions spent the whole night thinking about who would receive the flag. In the morning, everyone came to the Messenger of Allah (peace and blessings of Allah be upon him), each hoping that he would be given the flag. The Prophet (peace and blessings of Allah be upon him) asked:“Where is Ali bin Abi Talib?”It was said:“His eyes are hurting.”The Prophet (peace and blessings of Allah be upon him) sent for him, applied his saliva to his eyes, and prayed for him, and he was completely cured. Then the Prophet (peace and blessings of Allah be upon him) gave him the flag. Sayyiduna Ali (may Allah be pleased with him) said:“Shall I fight them until they become like us?”The Prophet (peace and blessings of Allah be upon him) said:“Go calmly. When you reach their field, first invite them to Islam and make clear to them the right of Allah. If Allah guides even one man through you, it is better for you than red camels.”