“Four rakʿahs before Ẓuhr, with no salām between them; for them the gates of heaven are opened.”

The report is weak on account of ʿUbayda b. Muʿtab al-Ḍabbī.

There is, however, another route. Muḥammad b. al-Ḥasan says in the Muwaṭṭaʾ: “Bakr b. ʿĀmir al-Bajlī narrated to us, from Ibrāhīm and al-Shaʿbī, from Abū Ayyūb al-Anṣārī, that the Messenger of Allah ﷺ used to pray four rakʿahs when the sun had passed its zenith. Abū Ayyūb asked him about that and he replied, ‘At that hour the heavens are opened, and I love that a righteous deed be recorded for me then.’ I asked, ‘Is Qurʾān recited in all of them?’ He said, ‘Yes.’ I asked, ‘Is there a salām between them?’ He replied, ‘No.’”

The general wording to which he previously referred is the phrase, “He used to pray four rakʿahs when the sun passed its zenith.” It is true that this wording is general and would encompass the zenith on Friday just as it does the zenith before the normal Ẓuhr Prayer. Even so, citing it in that form is inaccurate, for the wording found in Muwaṭṭaʾ Muḥammad (p. 158) actually reads:

“He used to pray four rakʿahs before Ẓuhr when the sun passed its zenith.” End of ḥadīth.