Muhammad bin Ishaq differed from the reports of Zayd bin Aslam and Ubaydullah bin Umar in both the chain and the text: in the chain he said "Umar bin Rafi'," whereas he is in fact Amr bin Rafi', and "Umar" is not correct, as al-Bukhari (may Allah have mercy on him) said; and in the text he said "which is the Asr prayer," whereas it is in fact "and the Asr prayer." The text of the hadith of Aishah has also been narrated differently, and what is correct is what we have mentioned.
It is transmitted from Sayyiduna Ibn Abbas (may Allah be pleased with him) that he recited: "Guard the prayers, and the middle prayer, and the Asr prayer."
The Book and then the Sunnah have singled out the Fajr prayer for additional virtue.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 2176