Remarriage
Those who make such declarations and then retract must free a slave before touching their wives. This is what you are commanded. Allah is aware of what you do.
58:3Those who put away their wives (by saying they are as their mothers) and afterward would go back on that which they have said, (the penalty) in that case (is) the freeing of a slave before they touch one another. Unto this ye are exhorted; and Allah is Informed of what ye do.