Narrated Ibn Umar (RA):
The Prophet's oath (ﷺ) used to be: "No, by Him Who turns (changes) the hearts."[Reported by al-Bukhari]. (ES)
Reference (ES): Bulugh al-Maram 1379 (ES)
In-book reference (ES): Book 13, Hadith 6 (ES)
English translation (ES): Book 13, Hadith 1379 (ES)