the Prophet said: "The adulteresses are the ones who marry themselves without Bayyinah (proof)."
Jami` at-Tirmidhi Book 11, Hadith 24
← Previous Hadith The Messenger of Allah said: "Whichever woman married without the permission of her Wali her marriage is invalid, her marriage is invalid, her marriage is invalid. If he entered into her, then the Mahr is for her in lieu of what he enjoyed from her private part. If they disagree, then the Sultan is the Wali for one who has no Wali."

Jami` at-Tirmidhi Book 11, Hadith 23 Next Hadith → And he did not narrate it in Marfu form, and this is more correct.

Jami` at-Tirmidhi Book 11, Hadith 25