In Syria, Hazrat Khalid bin Waleed was fighting with the people of Jabala bin Ahim. One day, a small army of Muslims came face to face with the enemy and they killed a senior Roman officer. At that time, Jabala killed all the Romans and Christian ordered the army to attack at once.
The condition of the Companions was very critical and Rafi ‘Ibn Umar Tai said to Khalid, “Today it is known that our qadha has come.” Khalid said, “You are telling the truth because I have forgotten the hat in which the hair of the Holy Prophet (sws) is blessed.” On the other hand, his condition was very critical and Rafi ‘Ibn Umar Tai said to Khalid, “It is known today that our qadha has come.” Khalid said, “You are telling the truth. The reason is that I forgot that hat.” In which the hairs of the Holy Prophet are blessed. This was the situation here and there and at night the Prophet (peace and blessings of Allaah be upon him) rebuked Abu ‘Ubaydah ibn al-Jarrah (may Allaah be pleased with him) who was the commander of the army in a dream, saying: The disbelievers have surrounded them on all sides.
If you go then you will arrive on time. Abu Ubaidah at that time ordered the army to get ready immediately, so he left with the army to invade. What we see on the way is a horse riding so fast in front of the army that no one could reach its surroundings.
He thought that there might be an angel who was going to help, but he cautiously ordered some speeding riders to inquire about the condition of the rider. When he approached, he called out to the young man to stop. He stopped what we thought was a young man and we saw that she was the wife of Khalid bin Waleed.
When they were asked about the situation, they said: O Amir! When I heard at night that you were very impatient to tell the people that Khalid bin Waleed was surrounded by the enemy, I thought that they would never fail because the Prophet (peace and blessings of Allaah be upon him) was with them. The hair of the Prophet (peace and blessings of Allaah be upon him) is blessed, but by chance I saw his hat which he had forgotten in the house in which the hair of Mubarak was.
I hastily took the hat and now I want to deliver it to them somehow. Hazrat Abu Ubaidah said, “Go quickly, may God bless you.” So they saddled the horse and moved on.
Hazrat Rafi ‘bin Umar, who was with Hazrat Khalid (RA) narrates that we were in such a state that we were disappointed with our lives. Suddenly the voices of Tahlil and Takbir were raised. Hazrat Khalid (RA) became curious as to where this voice was. Suddenly he saw his Roman horsemen running away in a daze and a horseman was chasing them.
Hazrat Khalid ran towards the rider on horseback and asked, “O young man, who are you?”
The voice came that I am your wife Umm Tamim and I have brought your blessed 275 hat with the blessing of which you used to conquer the enemy.
The narrator of the hadith swears that when Khalid (RA) attacked the infidels wearing a hat, the legs of the infidel army became stiff and the army of Islam was victorious.
(Waqdi Tarikh-e-Maqasid-ul-Islam, 9: 273)