What is the rationale behind the Prophet’s — prayers and peace be upon him — fasting of the Day of Ashura, given that Muslims have a greater claim to Moses than the Jews?

Dr. Al-Jizani did not state that the Prophet, peace and blessings be upon him, fasted Ashura by analogy; rather, he intended to refute the argument of those who specify a certain night for Qiyam (night prayer) and Dhikr (remembrance of God) by analogy with the day of Ashura. He clarified that the Prophet's abandonment of an act is a specific proof that takes precedence over general principles and analogy. He provided examples of this, such as the abandonment of the Athan (call to prayer) for the two Eids, the abandonment of touching the two Syrian corners of the Kaaba, and the abandonment of praying two rak'ahs at Al-Marwah after the Sa'i (ritual circumambulation).