مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2487
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) forbade gourds, green glazed pitchers, varnished jars and hollowed-out stumps, and he forbade mixing dates once they begin to ripen (balh) with unripe dates that have begun to take on a red or yellow colour (zahw).
Musnad Ahmad 2499lts isnad is saheeh, Muslim (1995)]