Hadith.886 - Abdullah ibn Sinan narrated from Imam Jafar ibn Muhammad Al-Sadiq (as) that
"The Messenger of Allah (sw) combined the Dhuhr (noon) and 'Asr (afternoon) prayers with one adhan and two iqamah, and he combined the Maghrib (sunset) and 'Isha (night) prayers in the same setting without any particular reason, using one adhan and two iqamah”.