Sayyiduna Abdullah bin Ja'far (may Allah be pleased with him) says: When Uwaymir al-Ajlani performed li'an with his wife, I was with the Messenger of Allah (peace and blessings be upon him). On the return from Tabuk, Uwaymir had denied his wife's pregnancy; he said: This pregnancy is from Ibn al-Sahma'. The Messenger of Allah (peace and blessings be upon him) said: "Bring your wife; the Qur'an has been revealed concerning the two of you." Then the two of them performed li'an after Asr near the pulpit, concerning the pregnancy.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب اللعان / 15306