مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3211
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: The Messenger of Allah (ﷺ) put together Zuhr and ’Asr, and Maghrib and ʻIsha’, when it was not raining and he was not travelling. They said: O Abu 'Abbas, what did he intend thereby? He said: To make things easy for his ummah.
Musnad Ahmad 3235A saheeh hadeeth]