Musnad Ahmed: Hadith 3425

A man came to the Prophet (ﷺ) and said: 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, 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.