Jabir bin Abdullah (may Allah be pleased with them both) said about the Hajj of the Prophet (peace and blessings be upon him) that the Prophet (peace and blessings be upon him) came to Muzdalifah and prayed Maghrib and Isha there with one adhan and two iqamahs, and did not pray anything between them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9497