The Messenger of Allah ﷺ was asked about his fasting, and he became angry. Umar said, "We are pleased with Allah as our Lord, with Islam as our religion, and with Muhammad as our Messenger."He was then asked about someone who fasts perpetually, and he replied, "He has neither fasted nor broken his fast," or, "He did not fast and did not break his fast."
أخبرنا محمد بن بشار قال حدثنا محمد قال حدثنا شعبة عن غيلان أنه سمع عبد الله بن معبد الزماني
أن رسول الله ﷺ سئل عن صومه فغضب فقال عمر رضينا بالله ربا وبالإسلام دينا وبمحمد رسولا وسئل عمن صام الدهر فقال لا صام ولا أفطر أو ما صام وما أفطر
Muslim recorded it in the chapter of Fasting, in the section on the recommendation of fasting three days from every month, etc., hadith no. 197/1162, from Muhammad bin Bashshar with the same wording. It is also found in Kubra, hadith no. 2686.