in its specific form is qunūt; on what grounds, then, do you claim that Anas meant only this particular supplication, rather than any of the other forms of qunūt?
Nor can it be argued: His singling out Fajr for qunūt, to the exclusion of the other prayers, proves that he meant this particular supplication, since all the other forms of qunūt you have mentioned are common to Fajr and the other prayers, whereas Anas singled out Fajr alone for qunūt. Nor can it be said (1) that he meant supplication against the disbelievers or supplication for the oppressed believers, because Anas reported that the Prophet performed qunūt for a month and then discontinued it. Thus, this (2) practice which he maintained must have been the familiar qunūt. Moreover, Abū Bakr, ʿUmar, ʿUthmān, ʿAlī, al-Barāʾ ibn ʿĀzib, Abū Hurayrah, ʿAbd Allāh ibn ʿAbbās, Abū Mūsā al-Ashʿarī, Anas ibn Mālik, and others performed qunūt (3).
This can be answered in several ways:
First: Anas—may Allah be pleased with him—reported that the Prophet—may Allah bless him and grant him peace—performed qunūt in both Fajr and Maghrib, as recorded by al-Bukhārī. He therefore did not single out Fajr for qunūt. Al-Barāʾ ibn ʿĀzib reported exactly the same. Why, then, should qunūt be restricted to Fajr?
If you say that qunūt in Maghrib was abrogated, your opponents from among the people of Kufa will reply: The same applies to qunūt in Fajr. Any argument you present for the abrogation of qunūt in Maghrib will also constitute evidence for the abrogation of qunūt in Fajr (4). You can never establish any proof