Ibn Shihab (may Allah have mercy on him) narrates from Sahl bin Sa'd (may Allah be pleased with him): I was present with the two who performed li'an in the presence of the Prophet (peace and blessings be upon him), and at that time I was fifteen years old.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب اللعان / 15338
Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) says: I heard the Messenger of Allah (peace and blessings be upon him) say concerning the two who performed li'an: "Your reckoning is with Allah. One of you is a liar; the husband has no claim over the wife." He said: O Messenger of Allah (peace and blessings be upon him)! My wealth! My wealth! He (peace and blessings be upon him) said: "You have no wealth. If you are truthful, then this wealth is gone in exchange for her private part having been made lawful for you; and if you lied against her, then that is even further from you."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب اللعان / 15339