Musnad Ahmad 3336
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn ‘Abbas (رضي الله عنه) that A man came to The Messenger of Allah (ﷺ) and said: O Messenger of Allah, by Allah, I have not come near my wife since watering the palm trees.-Watering the palm trees refers to when they were pollinated and left for forty days, and were not watered after Pollination - and I found a man with my wife. And her husband was white with thin legs and straight hair, and the one concerning whom she was accused had chubby legs and was darkish with very curly hair. The Messenger of Allah (ﷺ) said: "O Allah, show us.” Then he made them engage in li’an. And she gave birth to a boy who resembled the man concerning whom she was accused.