Sayyiduna Qutbah bin Qatadah al-Sadusi (may Allah be pleased with him) said: I said: O Messenger of Allah! Extend your hand; I pledge allegiance to you on behalf of myself and my daughter al-Huwaysilah, and if I were to lie against Allah, that would be deception (that is, this pledge is from a sincere heart). He said: Then Khalid bin al-Walid (may Allah be pleased with him) attacked us with his cavalry, and we said: We are Muslims. So he left us, and we took part with him in the campaign of al-Ubullah. We divided the spoils and filled our hands.
Hadith Referenceالمعجم الكبير للطبراني / باب القاف / 16087