Sayyiduna Abu Ayyub al-Ansari (may Allah be pleased with him) said: I was with the Prophet (peace and blessings be upon him) at Muzdalifah, and he (peace and blessings be upon him) prayed Maghrib and Isha combined.
Hadith Referenceالمعجم الكبير للطبراني / باب الخاء / 3851