Abu Hurairah said:
"Thumamah bin Uthal Al-Hanafi went to fetch some water that was near the Masjid and performed Ghusl, then he entered the Masjid and said: 'Ashhadu an la ila ha ill-Allah was ashhadu anna Muhammadan 'abduhu wa rasuluh (I bear witness that there is none worthy of worship except Allah and I bear witness that Muhammad is His slave and Messenger), O Muhammad, by Allah! There was no face on the face of the Earth that was more hateful to me than your face, not now your face has become the most beloved of all faces to me. You cavalry captured me and I want to perform 'Umrah. What do you think? The Prophet (ﷺ) gave him glad tidings and told him to perform 'Umarah."
English reference: Vol. 1, Book 1, Hadith 189
Arabic reference: Book 1, Hadith 190