(a) Al-Ash'athi narrates this hadith, and that Imam al-Bukhari (may Allah have mercy on him) said: I do not know what this hadith is.
(b) Imam al-Bayhaqi (may Allah have mercy on him) said: He said this because he does not know about this Abd al-Rahman. 'Wallahu a'lam' (And Allah knows best).
The hadiths on the times of the prayer have certainly already passed, and they are sufficient.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 3168
Hadith Gradingمحدثین:منكر
Hadith Takhrij«منكر۔ سنده صحيح الي البخاري وهو في تاريخه 5/372»