Hadith Scan

al-Nihayah fi Ghareeb al-Hadith wal Athar, by Ibn al-Athir, pg. 1000:

ومنه حديث مرض النبي ﷺ: قالوا: ما شأنه؟ أهجر؟، أي: اختلف كلامه بسبب المرض، على سبيل الاستفهام. أي: هل تغير كلامه واختلط لأجل ما به من المرض؟ وهذا أحسن ما يقال فيه، ولا يجعل إخباراً، فيكون إما من الفحش أو الهذيان. والقائل كان عمر، ولا يُظن به ذلك.

Among such reports is the hadith of the Prophet’s SAW illness: they said, “What is the matter with him? Is he delirious?”—that is, they questioned whether his speech had changed due to illness, in the form of a question. Meaning: Has his speech altered and become confused because of what he is suffering from? This is the best way to interpret it, and it should not be taken as a statement, for that would imply either rudeness or delirium—and it was ʿUmar who said it, and such a thing is not to be assumed of him.