Is saying "W'aym Allah" or "W'ayman Allah" an oath requiring expiation?

Primary text

The utterance of "W'aym Allah" or "W'ayman Allah" constitutes an oath requiring expiation (Kaffarah). This ruling is based on the Prophet Muhammad (peace be upon him) taking oaths using this phrase, coupled with the common usage (*'urf al-isti'mal*) supporting its application as an oath. Some scholars suggest this term is a plural of *yamin* (oath) with the final *noon* dropped for conciseness due to frequent use, while others believe it derives from *al-yamin* (the oath), implying "and by the oath of Allah I will do X."