It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that he said: "I prayed behind the Messenger of Allah (peace and blessings be upon him) eight rak'ahs together and seven rak'ahs together." (That is, he combined the Zuhr and Asr prayers, and the Maghrib and Isha prayers.)
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12750
It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that he said: "I prayed with the Messenger of Allah (peace and blessings be upon him) eight rak'ahs together and seven rak'ahs together."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12751
It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that he said: "The Messenger of Allah (peace and blessings be upon him) prayed eight rak'ahs together and seven rak'ahs together, without any illness or excuse."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12752
It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) prayed seven and eight rak'ahs combined in Madinah: Zuhr and Asr, and Maghrib and Isha.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12753