Narrated Abu Saeed al-Khudri: When the Messenger of Allah ﷺ swore an oath strongly, he said: No, by Him in Whose hand is the soul of Abul Qasim.
Explanation & Benefits
Shaykh Umar Farooq Saeedi
Benefits and Issues:
In most narrations, these words appear in this manner:
(By Him in Whose Hand is the soul of Muhammad) — that is, instead of using the kunyah Abu al-Qasim,
the noble name Muhammad (sallallahu alayhi wa sallam) is mentioned.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 3264