Surah Al-Mujaadila, Verse 3
Translation — Sahih International
And those who pronounce thihar from their wives and then [wish to] go back on what they said - then [there must be] the freeing of a slave before they touch one another. That is what you are admonished thereby; and Allah is Acquainted with what you do.
Source
Kur'an-ı Kerim, Mücâdele Suresi 58:3
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/58-suresi-3-ayet