English Translation
Narrated Ibn 'Abbas: "The Prophet prayed eight Rakat for the Zuhr and 'Asr, and seven for the Maghrib and 'Isha prayers in Medina." Aiyub said, "Perhaps those were rainy nights." Anas said, "May be."
This hadith is from Sahih al-Bukhari, the most rigorously authenticated collection in Islamic scholarship. No editorial opinion is added.