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