With this chain of narration, it states that the Messenger of Allah ﷺ mentioned Ramadan and said, "The month is twenty-nine days. The month is like this, and like this, and like this," and he said, "So calculate it," and he did not say "thirty."
و حدثنا عبيد الله بن سعيد حدثنا يحيى بن سعيد
بهذا الإسناد وقال ذكر رسول الله ﷺ رمضان فقال الشهر تسع وعشرون الشهر هكذا وهكذا وهكذا وقال فاقدروا له ولم يقل ثلاثين