´It was narrated that Abu Hurairah said:` "The swearing of the Messenger of Allah (ﷺ) was: 'No, and I ask Allah for forgiveness."'
Related hadith on this topic
Explanation & Benefits
Maulana Ataullah Sajid
Benefit:
The aforementioned narration is weak in its chain of transmission, and this phrase is not actually an oath but rather resembles an oath. Its origin could be:
«لَاوَالله، وَأَسْتَغْفِرُ اللَّهَ» (Badh al-Majhud)
Source: Commentary on Sunan Ibn Mājah by Mawlānā ‘Atā’ullāh Sājid, Page: 2093
Shaykh Umar Farooq Saeedi
Benefits and Issues:
The narration is weak.
And this phrase is not an oath, but rather resembles an oath.
Its origin could be:
(La wallah, astaghfirullah) (Bazl al-Majhud)
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 3265