Muwatta Malik Book 9, Hadith 4

Yahya related to me from Malik from Abu'z Zubayr al-Makki from Said ibn Jubayr that Abdullah ibn Abbas said, "The Messenger of Allah, may Allah bless him and grant him peace, prayed dhuhr and asr together and maghrib and isha together, and not out of fear nor because of travelling."

Previous Hadith

3 Yahya related to me from Malik from Nafi that Abdullah ibn Umar said, "The Messenger of Allah, may Allah bless him and grant him peace, used to join maghrib and isha together when it was urgent to travel."

Muwatta Malik Book 9, Hadith 3
Next Hadith

(with regards to above) Malik said, "I believe that was during rain."

Muwatta Malik Book 9, Hadith 5