Al-Qasim bin Muhammad narrates from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he heard the Messenger of Allah (peace and blessings be upon him): when (li'an) was carried out between al-Ajlani and his wife, his wife was pregnant. Her husband said: I have not gone near her since we finished pollinating the palms. 'Afr means that the palms are not given water for two months after being pollinated. The Messenger of Allah (peace and blessings be upon him) said: "Allahumma bayyin (O Allah, make the matter clear)." Then the Messenger of Allah (peace and blessings be upon him) called the husband; he had thin forearms and shins and brownish hair, and the man with whom she was accused was Sharik bin Sahma'. The woman gave birth to a child who was black, with kohl-dark eyes, curly hair, stout forearms and full shins. Al-Qasim says: Ibn Shaddad bin al-Had said to Sayyiduna Ibn Abbas (may Allah be pleased with them both): Is this the woman about whom the Messenger of Allah (peace and blessings be upon him) said: "If I were to stone anyone without evidence, I would have stoned this woman"? He said: No; rather, that one openly committed evil in Islam.
(b) Ibn Abi al-Zinad narrates from his father, with the same chain, that the Messenger of Allah (peace and blessings be upon him) carried out li'an between al-Ajlani and his wife while she was pregnant, and her husband had said: I have not gone near her since pollinating the palms. He says that the Messenger of Allah (peace and blessings be upon him) said: "Allahumma bayyin (O Allah, make this matter clear)," and they claimed that her husband had thin forearms.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب اللعان / 15350