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Is there any evidence specifically from Shia sources that confirms that the Prophet (pbuh) used to combine his prayers even when not in a state of emergency?

Sunni-Shi'aCombining PrayersSalah (Prayers)
Is there any evidence specifically from Shia sources that confirms that the Prophet (pbuh) used to combine his prayers even when not in a state of emergency?
Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answer updated 3 years ago

Yes of course. There are authentic evidence in both Sunni and Shia books. You can find many Hadeeths in this regard in Wasaa'il al-Shia.V. 4, page 220. باب جواز الجمع بين الصلاتين دون عذر 
You can also find many Hadeeths in Saheeh Muslim, Baab al-Jam' Bayn al-Salatain. باب الجمع بين الصلاتين 
Wassalam.