Musnad Ahmad 2262

It was narrated that 'Abdullah bin Shaqeeq said: Ibn ‘Abbas (رضي الله عنه) addressed us one day after ‘Asr, until the sun set and the stars came out, and the people started calling: The prayer, the prayer! Among the people was a man of Banu Tameem, who started saying: The prayer, the prayer. He got angry and said: Are you teaching me the Sunnah? I was present and saw the Messenger of Allah (ﷺ) put together Zuhr and ‘Asr, and Maghrib and 'Isha'. ‘Abdullah said: I was not sure about that, so when I met Abu Hurairah I asked him, and he confirmed it.