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
Those who declare their wives to be their mothers and thereafter go back on what they have said shall free a slave before they may touch each other. That is what you are exhorted to do. Allah is fully aware of all your deeds.