Surah Al-Mujaadila Verse 3

وَالَّذِينَ يُظَاهِرُونَ مِن نِّسَائِهِمْ ثُمَّ يَعُودُونَ لِمَا قَالُوا فَتَحْرِيرُ رَقَبَةٍ مِّن قَبْلِ أَن يَتَمَاسَّا ۚ ذَٰلِكُمْ تُوعَظُونَ بِهِ ۚ وَاللَّهُ بِمَا تَعْمَلُونَ خَبِيرٌ

Wallazeena yuzaahiroona min nisaaa'ihim summa ya'oodoona limaa qaaloo fatabreeru raqabatim min qabli any-yatamaaassaa; zaalikum too'azoona bih; wallaahu bimaa ta'maloona khabeer

Translation / The Meaning

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.